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FIZIKMOZAC 2010 WAVES - TRIAL QUESTIONS 6.1WAVES 1. The diagram shows a displacement – distance graph of a transverse wave motion. (a) On the graph, label: (i) direction of the vibration of the particles medium (ii) direction of the propagation of the wave. (b) Give one example of transverse wave. (c) Find (i) Amplitude (ii) Wavelength (d) If the frequency is 25 Hz, find the wave speed. 2. The diagram shows a tuning fork which produced a longitudinal wave. (a) Why does sound wave is a longitudinal wave? (b) Mark on the diagram (i) with a letter C which represents a point of compression. (ii) With a letter R which represents a point of rarefaction. (iii)With a letter λ which represents the wavelength (c) From the graph, find (i) Amplitude (ii) wavelength (d) If the speed of the sound wave is 330 ms -1 , find its frequency. 3. Diagram shows a simple pendulum which consists of a bob of mass 40.0 g at the end of a light inelastic string of length 20.0 cm. The pendulum makes 20 complete oscillations in 5.0 s. (a) By using the letters A,B and C in the diagram above state the (i) equilibrium position (ii) the meaning of period (b) What is the frequency of the oscillations of the pendulum ?

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FIZIKMOZAC 2010

WAVES - TRIAL QUESTIONS

6.1WAVES1. The diagram shows a

displacement – distance graph ofa transverse wave motion.

(a) On the graph, label:(i) direction of the vibration of

the particles medium(ii) direction of the propagation of

the wave.(b) Give one example of transverse

wave.

(c) Find(i) Amplitude

(ii) Wavelength

(d) If the frequency is 25 Hz, find thewave speed.

2. The diagram shows a tuning forkwhich produced a longitudinalwave.

(a) Why does sound wave is alongitudinal wave?

(b) Mark on the diagram(i) with a letter C which

represents a point ofcompression.

(ii) With a letter R whichrepresents a point ofrarefaction.

(iii)With a letter λ which represents the wavelength

(c) From the graph, find(i) Amplitude

(ii) wavelength

(d) If the speed of the sound wave is330 ms-1, find its frequency.

3. Diagram shows a simplependulum which consists of abob of mass 40.0 g at the end of alight inelastic string of length 20.0cm. The pendulum makes 20complete oscillations in 5.0 s.

(a) By using the letters A,B and C inthe diagram above state the

(i) equilibrium position

(ii) the meaning of period

(b) What is the frequency of theoscillations of the pendulum ?

FIZIKMOZAC 2010

(d) What happens to the frequencyof the oscillations of thependulum when the length ofthe pendulum is 80.0 cm ?

(e) After a while the pendulumstops to oscillate . Explainwhy?

(f) Plot a graph displacement –time to show why the pendulumstops to oscillate.

(g) State the form of energy whenthe pendulum

(i) at B (ii) at C

4. Question 2: Kedah 07Diagram 2.1 shows the initial reading ofa stopwatch at the beginning of anexperiment. The stopwatch was used tomeasure the time for 20 completeoscillations made by a simple pendulumof length, l.

Diagram 2.2 shows the reading of thestopwatch at the end of the experiment.

diagram 2.1

Diagram 2.2

(a) (i) State the type of error shown inDiagram 2.1.

..........................................................[1 mark]

(ii) What is the actual time taken forthe pendulum to complete 20oscillations?

..........................................................[1 mark]

(b) (i) Find the period of one completeoscillation, T, for this pendulum.

[1 mark]

FIZIKMOZAC 2010

(ii) The relationship between thelength, l, and the period, T, of asimple pendulum is given by the

equation, 2

24T

gl

.

Using the value of T obtained in(b)(i), calculate the length, l, ofthe pendulum.[Given that π = 3.142 and

g = 10 m s-2]

[2 marks]

6.2– 6.5 REFLECTION, REFRACTION,DIFFRACTION, INTERFERENCE

5. Question 7: Melaka Mid 08Diagram 7.2 shows a water wavespropagated from the sea to the beach.

Diagram 7.2(a) (i) State the change in

wavelength of the waterwaves from A to B.

................................................[1 mark

(ii) Explain why the observatioin (a)(i) occurs.

..............................................[1 mar

(iii) Name the wavephenomenon occurs inDiagram 7.2.

................................................[1 mark]

(b) The water waves with awavelength of 1.5 m travels withvelocity 2.0 m s-1 from the seato the beach. The velocity of thewaves when reach near thebeach is 1.2 m s-1. Calculate

(i) the frequency of the waves

[1 marks]

....]

n

...k]

(ii) the wavelength of the wavesnear the beach

[1 marks]

(c) Diagram 7.2 shows the seashoreof a fishing village. During therainy season, waves are big andcan cause the jetty to collapse.The fishermen want to relocatethe jetty.

Diagram 7.2

(i) Suggest the location of thenew jetty.

...............................................[1 mark]

FIZIKMOZAC 2010

(ii) Explain the reason for thissuggestion.

...............................................

...............................................[2 marks]

6. Question 4: Trengganu 07Diagram 4 shows the pattern of waterwaves moving towards a gap betweentwo walls at a water-theme park.Frequency of the water wave is 5 Hz.

Diagram 4

(a) (i) On Diagram 4, draw the pattern ofwater waves after passingthrough the gap.

[2 marks]

(ii) Name the wave phenomenoninvolved.

.............................................................[1 mark]

(b) Calculate the velocity of the waterwaves.

[2 marks]

(c) Explain how this phenomenonoccurs.

.............................................................

.............................................................

.............................................................[2 marks]

7. Question 5Diagram 5.1 shows the arrangement of

the apparatus for an experiment to

study a wave phenomenon. Diagram

5.2 shows the wave pattern formed on

the screen when a plane waves pass

through the gap.

Diagram 5.1

Diagram 5.2

FIZIKMOZAC 2010

(a) Name the wave phenomenonstudied in this experiment.

...........................................

(b) Observe Diagram 5.2, Comparethe wavelengths and wavepatterns of the waves before andafter they pass through the gap.

Wavelength: ..................................

Wave patterns: ...............................

(c) (i) State any change to the

amplitude of the waves

before and after they pass

through the gap.

...................................................

(ii) Explain the answer in (c)(i).

...................................

(d) The gap is made wider.

(i) What is the effect on the

waves passing through the

gap?

................................

(ii) In the space below draw

the wave patterns after it

pass through the wider

gap.

8. Question 5: Kedah 08Diagram 6.1 shows a water wavespassing through a log that floats inwater. Diagram 6.2 shows a studentstanding at one corner of a building at Bwho can hear the sound from aloudspeaker at A.

Name the wave phenomenonstudied in this experiment.

..........................................................[1 mark]

Diagram 5.2, Comparethe wavelengths and wavepatterns of the waves before andafter they pass through the gap.

....................

..................[2 marks]

(i) State any change to the

amplitude of the waves

and after they pass

..........................[1 mark]

...................................................[1 mark]

What is the effect on the

waves passing through the

...............................................[1 mark]

In the space below draw

the wave patterns after it

pass through the wider

Diagram 6.1 shows a water wavespassing through a log that floats inwater. Diagram 6.2 shows a student

a building at Bwho can hear the sound from a

(a) Based on Diagram 6.1 andDiagram 6.2,(i) What happens to the wave

after passing round the logand the corner of thebuilding?

...............................................

(ii) What happens to the amplitude ofthe waves after passing round thelog and the corner of thebuilding?

..........................................................

.................................................

(iii) Name the wave phenomenonthat is related to Diagram 6.1 andDiagram 6.2.

………………………………………..

Based on Diagram 6.1 and

What happens to the waveafter passing round the logand the corner of the

...............................................[1 mark]

What happens to the amplitude ofthe waves after passing round thelog and the corner of the

..........................................................

..........................................................[2 marks]

Name the wave phenomenonthat is related to Diagram 6.1 and

………………………………………..[1 mark]

FIZIKMOZAC 2010

(iv) What will happen to the speed ofthe water waves after passingthrough the log?

………………………………………..

(b) Refering to Diagram 6.1, what willhappen to a floating object that isplaced at(i) P?

……………………………………

(ii) Q?

……………………………………

(c) Name one other wave phenomenonthat occurs in Diagram 6.1.

…………………………………………

9. Question 7: Melaka 08Diagram 7.1 shows water wavespassing through the entrance of amodel harbour.

(a) (i) Name the type of wave is thewater wave.

.....................................................

What will happen to the speed ofafter passing

………………………………………..[1 mark]

Refering to Diagram 6.1, what willhappen to a floating object that is

……………………………………[1 mark]

……………………………………[1 mark]

Name one other wave phenomenonthat occurs in Diagram 6.1.

…………………………………………[1 mark]

Diagram 7.1 shows water wavesugh the entrance of a

(i) Name the type of wave is the

.....................................................[ 1 mark]

(ii) State why the wave shape isonly slightly change afterpassing the gap

........................................................

(b) Diagram 7.2 shows the crosssectional of the harbour wall thatfacing the waves. In Diagram7.2 draw the waves after passingtrough the gap.

(c) The model harbour in diagram 7.1 isto be use for commercial purposes.Suggest modifications to theharbour wall that enables i(i) to sustain the impact of the water

wave

........................................................

.......................................................

(ii) to reduce the impact of the waterwave to the shore

.........................................................

.........................................................

(d) During dry season large ship isadvice not to shelter at theharbour. Explain thissituation and suggesto load and unload the ship.

.........................................................

State why the wave shape isonly slightly change afterpassing the gap

........................................................[ 1 mark]

Diagram 7.2 shows the crosssectional of the harbour wall thatfacing the waves. In Diagram7.2 draw the waves after passing

) The model harbour in diagram 7.1 isto be use for commercial purposes.Suggest modifications to theharbour wall that enables i

to sustain the impact of the water

........................................................

.......................................................[2 marks]

to reduce the impact of the waterwave to the shore

.........................................................

.........................................................[ 2 marks]

During dry season large ship isadvice not to shelter at theharbour. Explain thissituation and suggest a methodto load and unload the ship.

.........................................................[ 2 marks]

FIZIKMOZAC 2010

10.Question 3: Perak 07Diagram 3 shows a monochromaticlight source connected to power supply.The light passes through the single slitand then go through the double-slit toform an interference pattern on thescreen. Bright and dark fringes areobserved on the white screen.

Diagram 3

(a) What type of wave is the lightwave?

..............................................................[1 mark]

(b) Why bright fringes and dark fringesare observed on the screen?

..............................................................

..............................................................[2 marks]

(c) What is monochromatic light?

..............................................................[1 mark]

(d) In the experiment, and the screen isplaced 5m from the double-slit. Thedistance between the double-slit is0.5 mm. The distance between twoadjacent bright fringes of thepattern is 6.0 mm.Calculate is the wavelength of thelight waves?

[2 marks]

11.Question 4: SBP 08Diagram 4 shows two identical waterwave pulses moving towards eachother. Wave interference occurs whenthe two waves meet at point O whilepropagating along the same medium.

(a) What is meant by interference?

...........................................................

...........................................................[1 mark]

(i) In the box above , complete thediagram to show the interferenceof waves at point O.

[1 mark]

(ii) Name the type of interferenceoccurs in (b)(i).

..........................................................[1 mark]

(iii) State what will happen to themotion of the cork at point O.

.......................................................[1 mark]

(b) (i) A ripple tank is set up with twoidentical dippers in contactwith the surface of the water.The separation between thetwo identical dippers 5.0 cm.

FIZIKMOZAC 2010

When the switch is on aninterference occurs.Theseparation between twoconsecutive antinodes is 3.0cm. The distance between theantinode points and thedippers is 10.0 cm. Calculatethe wavelength of the waterwaves produced.

[2 marks]

(ii) The separation of the twosources is increased to 8.0 cm.What will happen to thedistance between twoconsecutive antinodes?

[1 mark]

12.Trengganu 09: Question 3Diagram 3 shows an experiment todetermine the wavelength ofmonochromatic light waves by using ared light source.

(a) What is meant bymonochromatic light?

........................................................[1 mark]

(b) Why are red fringes formed onthe screen?

..........................................................[1 mark]

(c) The distance between the Youngdouble slit and the screen is 3.0m. The double slit used has theslit separation of 5 x 10-4 m.Calculate the wavelength of thered light.

[2 marks]

13.SBP 09: Question 6Diagram 6.1 and Diagram 6.2 showfringes are formed when identicalmonochromatic lights pass through thedouble slits.

Diagram 61. Diagram 6.2

(a) What is the meaning ofmonochromatic light?

………………………………………[1 mark]

(b) Explain how fringes are formedon the screen?

………………………………………

………………………………………

………………………………………[2 marks]

FIZIKMOZAC 2010

(c) Using Diagram 6.1 and Diagram

6.2:

(i) Compare the distancebetween the slits, a

…………………………………

(ii) Compare the wavelength ofthe light, λ , that passes through the double slits.

………………………………………

(iii)Compare the distancebetween the double slits andthe screen, D.

…………………………………..

(iv)Compare the distancebetween the fringes,

…………………………………

(d) Using your answers in 6 (c)state the relationship betweenand a .

…………………………………………

…………………………………………

14.Kelantan 09: Question 6Diagram 6.1 and Diagram 6.2 show thebright and dark fringes of the wavesformed on the screen when a light rayspass through a double slit plate.

Diagram 6.1 and Diagram

Compare the distancea.

…………………………………[1 mark]

Compare the wavelength ofthe light, λ , that passes through the double slits.

………………………………………[1 mark]

Compare the distancebetween the double slits and

…………………………..[1 mark]

Compare the distancebetween the fringes, x.

…………………………………[1 mark]

…………………………………………

……………………………[1 mark]

Kelantan 09: Question 6Diagram 6.1 and Diagram 6.2 show thebright and dark fringes of the wavesformed on the screen when a light rayspass through a double slit plate.

(a) What is meant by a coherentsource?

..........................................................

(b) Observe Diagram 6.1 andDiagram 6.2.(i) Compare the distance

between two slits.

...................................................

(ii) Compare the distancebetween consecutive brightfringes.

...................................................

(iii) Compare the distancebetween the double slit plateand the screen.

.................................................

What is meant by a coherent

..........................................................[1 mark]

Observe Diagram 6.1 and

Compare the distancebetween two slits.

...................................................[1 mark]

Compare the distancebetween consecutive bright

...................................................[1 mark]

Compare the distancebetween the double slit plateand the screen.

.................................................[1 mark]

FIZIKMOZAC 2010

(c) (i) Relate the distance betweenthe two slits with thedistance betweenconsecutive bright fringes.

..................................................

(ii) Name the wave phenomenonwhich forms the pattern ofthe fringes in Diagram 6.1 andDiagram 6.2

...................................................

(d) Explain how the formation ofbright fringes and dark fringesoccur.

.........................................................

.........................................................

6.6 SOUND WAVES

15.Question 4: SBP 07Diagram 4.1 shows a submarinetransmitting ultrasonic waves directedat a big rock on the sea bed. Aftersometime, the submarine detects thewave again.

Diagram 4.1

(a) State the wave phenomenoninvolved.

……………………………………

(i) Relate the distance betweenthe

consecutive bright fringes.

..................................................[1 mark]

Name the wave phenomenonwhich forms the pattern ofthe fringes in Diagram 6.1 and

...................................................[1 mark]

Explain how the formation ofbright fringes and dark fringes

.........................................................

.........................................................[2 marks]

Diagram 4.1 shows a submarinetransmitting ultrasonic waves directedat a big rock on the sea bed. Aftersometime, the submarine detects the

State the wave phenomenon

……………………………………...........[ 1 mark ]

(b) Explain why the submarine usedultrasonic wave but not ordinarysound wave?

...................................................................

(c) (i) Calculate the distance of thesubmarine from the big rock if thesubmarine detects the secondwave after 1.5 seconds.[Velocity of ultrasonic wave

= 1560 ms-1]

(ii) Diagram 4.2 shows how thepulses of the transmittedultrasonic wave isthe screen of a cathode rayoscilloscope (CRO).

Diagram 4.2

On diagram 4.2 draw the pulses of thewave received by the submarine after1.5 seconds later. Given the time baseof the CRO is 0.5 s/cm.

Explain why the submarine usedultrasonic wave but not ordinary

..............................[ 2 marks ]

Calculate the distance of thesubmarine from the big rock if thesubmarine detects the secondwave after 1.5 seconds.[Velocity of ultrasonic wave

[ 2 marks ]

Diagram 4.2 shows how thepulses of the transmittedultrasonic wave is displayed onthe screen of a cathode rayoscilloscope (CRO).

Diagram 4.2

On diagram 4.2 draw the pulses of thewave received by the submarine after1.5 seconds later. Given the time base

[ 2 marks ]

FIZIKMOZAC 2010

16.Question 7: Johor 07(a) The siren is located 20 m from a

large building, as shown in Diagram7.1.

Diagram 7.1

The siren with the frequency 1000Hz, is briefly sounded once. A shorttime later, the sound is heard again.

(i) Why is this second sound heard?

…...........................................................

(ii)What is the frequency of thissecond sound? Tick one box.

less than 1000 Hz

1000 Hz

more than 1000 Hz

(iii)What is the amplitude of this secondsound? Tick one box.

less than the original sound

the same as the original sound

more than the original sound

The siren is located 20 m from alarge building, as shown in Diagram

The siren with the frequency 1000Hz, is briefly sounded once. A shorttime later, the sound is heard again.

Why is this second sound heard?

............................[1 mark]

What is the frequency of thissecond sound? Tick one box.

[1 mark]

this second

less than the original sound

the same as the original sound

more than the original sound

[1 mark]

(iv) Why the second sound is softthan the original sound?

…...........................................................

.................................................................

(b) A student found it is difficult tomeasure the speed of sound insidethe building using only a stopwatchand a metre rule. Give two reasons.

………………………………………...

…………………………………………………

(c) Diagram 7.2 shows the correctmethod used by a student tomeasure the speed of sound .

Diagram 7.2

The sound is received by twomicrophones placed at differentdistance in front of the loud speaker.The separation between the twomicrophones is, d. The time interval,t, between the sounds received bythe two microphones is recorded.The results of the experiment isshown in Diagram 7.3.

Why the second sound is softthan the original sound?

….............................................................

.................................................................[1 mark]

A student found it is difficult tomeasure the speed of sound insidethe building using only a stopwatch

metre rule. Give two reasons.

……………………………………….............

…………………………………………………[2 marks]

Diagram 7.2 shows the correctmethod used by a student tomeasure the speed of sound .

Diagram 7.2

The sound is received by twomicrophones placed at differentdistance in front of the loud speaker.The separation between the two

. The time interval,between the sounds received by

the two microphones is recorded.xperiment is

Diagram 7.3.

FIZIKMOZAC 2010

Diagram 7.3

Diagram 7.4 shows the trace observedat the screen of CRO.

Diagram 7.4The time-base setting on the CRO is 1.0ms/cm.

(i)Determine the time interval, t, fromthe trace in Diagram 7.4.

[2 marks]

(ii) Using the answer in (a)(i),determine the distance, d, fromthe graph.

[2 marks]

17.Question 7: Mid Melaka 09Diagram 7 shows a fishing boat using asonar system to detect a shoal of fish.

Diagram 7

(a) Based on Diagram 7(i) Name the wave phenomenon

used to detect the fish.

......................................................[1 mark]

(ii) Compare the time taken forsending detective wave tothe fish and the time taken forthe receiver to receive thesignal.

.....................................................[1 mark]

(b) Why did sonar system is used asa device to detect the fish?

..........................................................[1 mark]

FIZIKMOZAC 2010

(c) The time to detect the shoal offish is 0.05 seconds, the speed ofthe sound waves in water is 1500ms-1. Calculate the distance ofthe shoal of fish from the fishingboat

(d) The fishing boat is to beupgraded with a bettercommunication system such as atransmitter and a receiver and aradar system hence able todetect any air flight.(i) Explain the best location of

the new detection device towork efficiently.

...................................................

...................................................

(ii) State the type of waveproduce by the new detectiondevice.

...................................................

(iii) Suggest one modification tothe communication device toincrease the effectiveness ofthe communication system

…………………………………

…………………………………

The time to detect the shoal offish is 0.05 seconds, the speed ofthe sound waves in water is 1500

Calculate the distance ofthe shoal of fish from the fishing

[2 marks]

The fishing boat is to beupgraded with a bettercommunication system such as atransmitter and a receiver and aradar system hence able to

Explain the best location ofthe new detection device to

.........................................

...................................................[2 marks]

State the type of waveproduce by the new detection

...................................................[1 mark]

Suggest one modification tocommunication device to

increase the effectiveness ofthe communication system

…………………………………

…………………………………[2 marks]

18.Question 7: MRSM 07Figure 7.1 shows water wavesapproaching a barrier in a ripple tank.The frequency of the vibrator is 25 Hz.

(a) (i) In Figure 7.1, draw theits direction of propagation afterit hits the barrier.

(ii) Compare the wavelength and thespeed of the waves before andafter it hits the barrier.

..........................................................

(b) Traditional fishermen often havedifficulties to detect shoals of fish.To overcome this problem, they usea modern technology to loshoals of fish.

(i) Name one modern technologywhich fishermen use to detectshoals of fish.

....................................................

(ii) State two reasons why thistechnology is used instead ofconventional sound waves.

....................................................

...................................................

(iii) Explain the technique used bythis technology to detect ashoal of fish.

....................................................

....................................................

Question 7: MRSM 07Figure 7.1 shows water wavesapproaching a barrier in a ripple tank.The frequency of the vibrator is 25 Hz.

(i) In Figure 7.1, draw the waves andits direction of propagation afterit hits the barrier.

[1 mark](ii) Compare the wavelength and the

speed of the waves before andafter it hits the barrier.

..........................................................[1 mark]

Traditional fishermen often havedifficulties to detect shoals of fish.To overcome this problem, they usea modern technology to locate the

Name one modern technologywhich fishermen use to detectshoals of fish.

....................................................[1 mark]

reasons why thistechnology is used instead ofconventional sound waves.

....................................................

...................................................[2 marks]

Explain the technique used bythis technology to detect a

....................................................

....................................................

FIZIKMOZAC 2010

Figure 7.2 shows the trace displayedon the screen of a cathode rayoscilloscope. A pulse is transmittedfrom a boat into the water to detectthe presence of fish shoals.

(iv) The time base of theoscilloscope in Figure 7.2 isset at 0.4 s cm-1 and the speedof sound in water is 1 200 m/s.

[2 marks]

19.Question 8: Kedah 07Diagram 8.1 shows the positions of twopolicemen A and B standing behind the twotall buildings. The policemen are holding awalkie-talkie each. The two buildings are 4m apart.

The policemen communicate with eachother by using radio waves.

Figure 7.2 shows the trace displayedon the screen of a cathode rayoscilloscope. A pulse is transmitted

t into the water to detectthe presence of fish shoals.

The time base of theoscilloscope in Figure 7.2 is

and the speedof sound in water is 1 200 m/s.

[2 marks]

Diagram 8.1 shows the positions of twopolicemen A and B standing behind the twotall buildings. The policemen are holding a

talkie each. The two buildings are 4

The policemen communicate with each

(a) Radio waves are a type of ………………

(b) (i) Name the wave phenomenon whicenables the policemen tocommunicate with each other.

..............................................................

(ii) Name two factors that affect theeffectiveness of the abovephenomenon.

............................................................

..........................................................

Table 8.1 shows a few radio frequenciessuggested by the policemen.

TABLE

(c) Calculate the wavelengths of each of theradio waves suggested by assuming thespeed of radio waves in air is 3.0 x 10m s–1.

.....................................................................

.....................................................................

io waves are a type of ………………[1 mark]

Name the wave phenomenon whichenables the policemen tocommunicate with each other.

..............................................................[1 mark]

Name two factors that affect theeffectiveness of the above

............................................................

..........................................................[2 marks]

Table 8.1 shows a few radio frequenciessuggested by the policemen.

Suggestedfrequencies

50 MHz

500 MHz

5 GHz

TABLE 8.1

Calculate the wavelengths of each of theradio waves suggested by assuming thespeed of radio waves in air is 3.0 x 108

[4 marks]

Based on your answer in (c), which isthe most suitable radio frequency to beused by the policemen. Explain your

.....................................................................

.....................................................................[2 marks]

FIZIKMOZAC 2010

(e) Name one type of electromagnetic wavewhich is suitable for satellitecommunication. Give a reason for youranswer.

....................................................................

....................................................................[2 marks]

6.7ELECTROMAGNETIC WAVES

20.Question 6: Melaka 09Diagram 6 shows a group of waves K, L,M, N, O and P is arranged accordinglybase on their frequencies and wavelengths. The energy of the wave isincreasing from left to right and invacuum the waves propagate at samespeed.

(a) Name the arrangement pattern givento a group of waves when it isarranged in a specific manner asshown on Diagram 6.

............................................................[1 mark]

(b) Observe Diagram 6.(i) State the changes from left to right

on

the frequency of the waves

..............................................................[1 mark]

the wave length of the waves

...............................................................[1 mark]

(ii) the comparison between theamplitude of the waves

...........................................................[1 mark]

(c) Based on the information given andthe answers in 6(b)(i),

(i) what is the relationship between thefrequency and the energy of thewave?

...............................................................

[1 mark]

(ii) write the relationship between thefrequency, f , the wave length, λ and the velocity of the wave, v

........................................................[1 mark]

(d) Wave with labeled P is chose fortherapy purposes in medicalfield, explain why this wave ischose for the purpose.

.......................................................

........................................................[2 marks]

FIZIKMOZAC 2010

TRIALS ESSAY QUESTIONS

21.Conceptual: Teknik 07Diagram 10.1 and Diagram 10.2 showthe water and sound wavespropagating towards a reflector.

(i) What is meant by reflectedwaves?

[ 1 mark

(ii) With reference to Diagram 10.1and Diagram 10.2, compare theincident and reflected angle,wavelength, frequency, speedand direction of propagation ofthe reflected wave.

(iii) State the principle of reflectionof waves.

Diagram 10.1 and Diagram 10.2 show

propagating towards a reflector.

What is meant by reflected

mark ]

With reference to Diagram 10.1and Diagram 10.2, compare theincident and reflected angle,wavelength, frequency, speedand direction of propagation of

[5 marks]

State the principle of reflection

[ 1 mark ]

22.Understanding: Teknik 07Discuss on how you would use thesound wave to determine the depth ofthe sea.

23.Understanding: Melaka Mid 08Diagram 12.1 shows an audio frequencygenerator connected to a speaker andplaced in front the three glasses P, Qand R.The generator and speaker can producesound with the same speed butdifferent loudness.

Diagram 12.1

(a) State the physical quantity thateffects the loudness of the sound

(b) When a loudness sound isgenerated, the three glassesbegin to vibrate and as theloudness of the sound isincreases at one stage, the glassP breaks at once.Explain this situation.

Understanding: Teknik 07how you would use the

sound wave to determine the depth of

[ 3 marks ]

Understanding: Melaka Mid 08Diagram 12.1 shows an audio frequencygenerator connected to a speaker andplaced in front the three glasses P, Q

The generator and speaker can producesound with the same speed but

Diagram 12.1

State the physical quantity thateffects the loudness of the sound

[ 1 mark]

When a loudness sound isgenerated, the three glassesbegin to vibrate and as theloudness of the sound isincreases at one stage, the glassP breaks at once.Explain this situation.

[ 4 marks]

FIZIKMOZAC 2010

24. Qualitative problem: Teknik 07You have been assigned as aconsultant to assemble a speakersystem and to improve the acoustics ofa school hall. Using the appropriatephysics concept explain how theinstallation of the speaker system andother modifications that can improveaudible sound. In your explanation,elaborate on the following points:

(i) The arrangement of the speakers.

(ii) Wall and floor finishing.

(iii) Power of the loud speakers

[10 marks]

25.Making Decision: Melaka Mid 08

Diagram 12.2 shows on coming seawave approaching a harbour.

Table 12.3 shows the fourcharacteristics of harbour models, S, T,U, and V and a depth of water locationthat can be used to build a suitable andsafety harbour.

Qualitative problem: Teknik 07

consultant to assemble a speakersystem and to improve the acoustics of

appropriatephysics concept explain how theinstallation of the speaker system andother modifications that can improveaudible sound. In your explanation,elaborate on the following points:

The arrangement of the speakers.

Power of the loud speakers

[10 marks]

Making Decision: Melaka Mid 08

Diagram 12.2 shows on coming sea

characteristics of harbour models, S, T,U, and V and a depth of water locationthat can be used to build a suitable and

You are required to determine the mostsuitable and safety model of harbour.Study the specifications of all the fourharbour models based on the followingaspects.

- The location of the wall barrier- Water depth- Gap between the wall barriers- Size of the wall barrier’s base

Explain the suitability of the aspects.Justify your choice choice.

26.Quantitative: Melaka Mid 08A ship transmits an ultrasonic wave offrequency of 66 kHz to the seabed andreceives an echo 0.16 s later. The depthof the sea is 120 m.

Calculate(i) the speed of the ultrasonic wave

in the water,

(ii) the wavelength of the ultrasonicwave in the water.

You are required to determine the mostsuitable and safety model of harbour.Study the specifications of all the fourharbour models based on the following

The location of the wall barrier

Gap between the wall barriersSize of the wall barrier’s base

Explain the suitability of the aspects.stify your choice choice.

[10 marks]

: Melaka Mid 08A ship transmits an ultrasonic wave offrequency of 66 kHz to the seabed andreceives an echo 0.16 s later. The depth

the speed of the ultrasonic wave

the wavelength of the ultrasonicwave in the water.

[5 marks]

FIZIKMOZAC 2010

27.Section B: Mara 08Diagrams 10.1(a) and Diagram 10.2(a)show the apparatus set-up for aYoung’s double-slit experiment, todetermine the wavelength of amonochromatic light. Diagrams 10.1(b)and 10.2(b) show the fringes formed onthe screen for each situation.

(a) What is meat by monochromaticlight?

(b) Using all the diagrams given,compare the distance between thedouble-slit and the screen, thedistance between two successivebright fringes, the number of fringesand the width of fringes. Deducethe relationship between thedistance of the double-slit and thescreen and the distance betweentwo successive bright fringes.

[5 marks]

(c) The assembly hall of Mozac is smallin size and produces too muchecho. The administrator intends toreplace the old building with a new

Diagrams 10.1(a) and Diagram 10.2(a)up for a

slit experiment, todetermine the wavelength of a

light. Diagrams 10.1(b)and 10.2(b) show the fringes formed on

What is meat by monochromatic

[1 mark]

Using all the diagrams given,etween the

slit and the screen, thedistance between two successivebright fringes, the number of fringesand the width of fringes. Deducethe relationship between the

slit and thescreen and the distance between

ve bright fringes.[5 marks]

The assembly hall of Mozac is smallin size and produces too muchecho. The administrator intends toreplace the old building with a new

one. The new hall should be able toaccomodate at least 800 studentsand is suitable for holding otheractivities like concerts.modifications that need to be doneto the old hall. Using theknowledge on wave characteristics,explain the modification based onthe following aspects:- The design of the hall- The furnishings in the hall- The sound and lighting systems

in the hall

28. Melaka 09: section B

Diagram 10.1 and 10.2 show vibrationsproduced by plucking the stringuitar of different thickness.

A microphone is used to detect thesound waves of each guitar string. Thetraces displayed on the oscilloscopesare shown in diagrams 10.1 and 10.2.

(a) State what type of wave is soundwave.

one. The new hall should be able todate at least 800 students

and is suitable for holding otheractivities like concerts. Suggestmodifications that need to be doneto the old hall. Using theknowledge on wave characteristics,explain the modification based onthe following aspects:

esign of the hallThe furnishings in the hallThe sound and lighting systems

Melaka 09: section B

Diagram 10.1 and 10.2 show vibrationsproduced by plucking the string of

thickness.

A microphone is used to detect thesound waves of each guitar string. Thetraces displayed on the oscilloscopesare shown in diagrams 10.1 and 10.2.

State what type of wave is sound

[1 markah]

FIZIKMOZAC 2010

(b) (i) Using Diagram 10.1 and 10.2,compare the diameter of guitarstring, amplitude of wave andthe number of oscillations.

(ii) State the relationship betweenfrequency of sound wave anddiameter of thestring.

(iii) State the relationshipbetween the frequency and thepitch of the sound wave

(c) Diagram 10.3 shows a sound waveproduced by vibration of a tuningfork. The sound wave travels in air.

With the help of Diagram 10.3explain how the sound wave isproduced. [4 marks]

Diagram 10.4 shows a radarsystem at an airport. Signals aretransmitted from the radar systemto determine the position of anairplane.

Using Diagram 10.1 and 10.2,diameter of guitar

string, amplitude of wave andthe number of oscillations.

State the relationship betweenfrequency of sound wave and

State the relationshipbetween the frequency and thepitch of the sound wave

[5 marks]

Diagram 10.3 shows a sound waveproduced by vibration of a tuning

The sound wave travels in air.

With the help of Diagram 10.3explain how the sound wave is

[4 marks]

Diagram 10.4 shows a radarsystem at an airport. Signals aretransmitted from the radar systemto determine the position of an

Suggest modifications that need to bedone to improve the radar system. Youshould consider the following aspectsin your explanation.

(i) The diameter of the parabolic disc

(ii) The distance of the signal receiverfrom the centre of the parabolicdisc.

(iii) The types of wave transmitted

(iv) The height of the parabolic discfrom the ground.

(v) The material of the parabolic disc

Suggest modifications that need to bedone to improve the radar system. Youshould consider the following aspects

The diameter of the parabolic disc

The distance of the signal receiverfrom the centre of the parabolic

pes of wave transmitted

The height of the parabolic disc

The material of the parabolic disc

[10 marks]

FIZIKMOZAC 2010

29. Kedah 09: Section BDiagram 10.1 shows a tuning forkvibrating near a microphone. Thesound waves detected by themicrophone are displayed on a cathode-ray oscilloscope.When the tuning fork is struck harder,the sound produced is louder and thesound waves produced are shown inDiagram 10.2

(a) (i) What is the meaning oflongitudinal waves?

[1 mark]

(ii) Explain how a tuning forkproduces sound waves.

[4 marks]

(b) Diagram 10.1 and Diagram 10.2,(i) Compare the amplitudes of

vibration of the tuning forks.(ii) Compare the peak values, a1

and a2 of the waves displayedby the oscilloscope.

(iii) Relate the peak valuesdisplayed by theoscilloscopeto the amplitudeof the sound wave.

(iv) Relate the peak valued to theloudness of the soundproduced.

(v) Deduce the relationshipbetween the loudness of the

sound and the amplitude ofthe wave.

[5 marks]

(c) Diagram 10.3 shows a boat usingsound waves to measure the depthof the sea.

(i) Using your knowledge of thenature and phenomena ofwaves, explain how thefollowing aspects of the waveaffects the results obtained.- Frequency of the waves- Energy of the waves

[4 marks](ii) List the equipment needed for

the measurement.[4 marks]

(iii) Explain how the depth of thesea is determined.

[2 marks]

FIZIKMOZAC 2010

30.MARA 09: Section BDiagram 10.1 and Diagram 10.2 showthe pattern of interference of waterwaves.

(a) How does constructiveinterference occur? [1 mark]

(b) Using Diagram 10.1 and Diagram10.2 compare the

(i) Distance between twocoherence source.

(ii) Vertical distancebetween the point P andrespective coherencesource.

(iii) Wavelength of thepropagating water wave.

Diagram 10.1 and Diagram 10.2 showthe pattern of interference of water

interference occur? [1 mark]

Using Diagram 10.1 and Diagram

Distance between twocoherence source.

[1 mark]Vertical distancebetween the point P andrespective coherence

[1 mark]Wavelength of thepropagating water wave.

[1 mark]

(iv) Distance between twoconsecutive antinodes.

(c) Relate the distance between twocoherence source and thedistance between twoconsecutive antinodes.

(d) Diagram 10.3 shows a motherstanding on a balcony calling herson for lunch.

Using physics concept, explainwhy her son could not her herclearly.

Distance between twoconsecutive antinodes.

[1 mark]Relate the distance between two

rce and thedistance between twoconsecutive antinodes.

[1 mark]

Diagram 10.3 shows a motherstanding on a balcony calling her

Using physics concept, explainwhy her son could not her her

[4 marks]

FIZIKMOZAC 2010

(e) Diagram 10.4 shows a boatbelonging to a fisherman.

A group of fisherman plan to go fordeep-sea fishing for three months. Theboat in Diagram 10.4 is not suitable forthe job and they decide to makemodification to it.Using the appropriate physicsconcepts, suggest and explain themodifications that have to be done dothe boat. The modifications shouldinclude the following aspects.

(i) Shape of the boat(ii) Material used to build the boat(iii) Type of wave used to detect

the fish(iv) The freshness of the fish.

[10 marks]