Download - F–2482 Sub. Code 7BPH1C1

Transcript

Wk 4

F–2482

B.Sc. DEGREE EXAMINATION, NOVEMBER 2019

First Semester

Physics

PROPERTIES OF MATTER AND SOUND

(CBCS – 2017 onwards)

Time : 3 Hours Maximum : 75 Marks

Section A (10 2 = 20)

Answer all questions.

1. Define Hooke’s law.

íúU Âvø¯ Áøμ¯Ö.

2. Define elastic limit.

Áøμ¯Ö «m]°¯À GÀø».

3. What is non-uniform bending?

^μØÓ ÁøÍÄ GßÓõÀ GßÚ?

4. What is cantilever?

ÁøÍa \mh® GßÓõÀ GßÚ?

5. Write Poiseuille’s formula.

£õ´_¼ß Áõ´¨£õmøh GÊxP.

6. Define coefficient of viscosity.

£õQ¯À SnPzøu Áøμ¯Ö.

Sub. Code 7BPH1C1

F–2482

2

Wk 47. What is simple harmonic motion?

Gί ^›ø\ C¯UP® GßÓõÀ GßÚ?

8. What is noise pollution?

J¼ ©õ_£kuÀ GßÓõÀ GßÚ?

9. What is the velocity of sound in air medium?

ÁÎ ©sh»zvÀ J¼°ß vø\÷ÁP® ¯õx?

10. Write any two applications of ultrasonic waves.

«ö¯õ¼ Aø»PÎß H÷uÝ® C¸ £¯ßPøÍ GÊxP.

Section B (5 5 = 25)

Answer all questions, choosing either (a) or (b).

11. (a) Deduce the expression for Poisson’s ratio in terms of elastic constants.

«m] ©õÔ¼Pøͨ £¯ß£kzv £õ´\õß uPÂØPõÚ

\©ß£õmøh¨ ö£ÖP.

Or

(b) Calculate the rigidity modulus by static torsion method.

{ø»°¯À •ÖUS •øÓ°À Âø쨦U SnPzøuU

PnUQkP.

12. (a) Derive the expression for cantilever depression.

ÁøÍ \mhzvß CÓUPzvØPõÚ ÷PõøÁø¯¨ ö£ÖP.

Or

(b) Explain the experimental determination of Young’s modulus using mirror and telescope.

\©uÍ Bi ©ØÖ® öuõø» ÷|õUQø¯¨ £¯ß£kzv

¯[SnP® PnUQk® ÷\õuøÚø¯ ÂÁ›.

F–2482

3

Wk 413. (a) Calculate the excess of pressure in a liquid drop and

bubble.

vμÁzxÎ ©ØÖ® SªÈ°ß ªøP¯ÊzuzvøÚU

PnUQk.

Or

(b) Deduce the equation of continuity liquid flow with suitable explanation.

uS¢u ÂÍUPzxhß öuõhº vμÁ KmhzvØPõÚ

\©ß£õmøh Á¸Â.

14. (a) What are free, Damped and forced vibrations? Explain.

uøh¯ØÓ, uøh³Ö ©ØÖ® vo¨¦ AvºÄPÒ GßÓõÀ

GßÚ? ÂÍUSP.

Or

(b) (i) Explain sharpness of resonance.

(ii) What are characteristics of musical sound.

(i) JzuvºÂß Tºø©ø¯ ÂÍUSP.

(ii) Cø\ö¯õ¼°ß ußø©PÒ ¯õøÁ?

15. (a) Deduce the expression for longitudinal waves in gases.

Áõ²UPÎÀ ö|mhø»¨ £μÁ¾UPõÚ ÷PõøÁø¯¨

ö£ÖP.

Or

(b) What are ultrasonic waves? Give their properties.

«ö¯õ¼Aø»PÒ GßÓõÀ GßÚ? Auß £s¦PøÍ

GÊxP.

F–2482

4

Wk 4 Section C (3 10 = 30)

Answer any three questions.

16. Explain experimental determination of rigidity modulus using torsional pendulum.

•ÖUS F\ø»¨ £¯ß£kzv ÂøÓ¨¦U SnP® Põq®

÷\õuøÚø¯ ÂÁ›.

17. How to determine the Young’s modulus of a bar by cantilever oscillation method.

ÁøÍ\mh Aø»ÂøÚ¨ £¯ß£kzv J¸ \mhzvß ¯[

SnPzøu GÆÁõÖ PnUQkÁõ´?

18. Explain experimental determination of viscosity of low viscous liquid by capillary flow method.

~sxøÍ Kmh •øÓ°À SøÓ £õQ¯À ©v¨¦ öPõsh

vμÁzvß £õQ¯À Gs PnUQk® ÷\õuøÚø¯ ÂÍUSP.

19. Explain experimental setup, working and uses of Melde’s string with neat diagram.

ö©Àj ÷\õuøÚ Aø©¨¦, ö\¯À£õk ©ØÖ®

£¯ß£õkPøÍz uS¢u £hzxhß ÂÁ›.

20. Explain production of ultrasonic waves by piezo electric oscillator.

AÊzu ªßxi¨£õß Aø»°¯ØÔø¯¨ £¯ß£kzv

«ö¯õ¼ Aø»PøÍ E¸ÁõUS® •øÓø¯ ÂÁ›.

——————

Wk 4

F–2483

B.Sc. DEGREE EXAMINATION, NOVEMBER 2019

First Semester

Physics

MECHANICS AND RELATIVITY

(CBCS – 2017 onwards)

Time : 3 Hours Maximum : 75 Marks

Section A (10 2 = 20)

Answer all questions.

1. Define centre of gravity.

Dº¨¦ ø©¯zvøÚ Áøμ¯Ö.

2. What is static and dynamic friction?

{ø»°¯À ©ØÖ® C¯UP¯À Eμõ´Ä GßÓõÀ GßÚ?

3. Write the Newton’s law of gravitation.

{³mhÛß Dº¨¦ Âv°øÚ GÊxP.

4. What is escape velocity?

Âk£k vø\ ÷ÁP® GßÓõÀ GßÚ?

5. Define moment of inertia.

Áøμ¯Ö : {ø»©z v¸¨¦zvÓß.

Sub. Code 7BPH1C2

F–2483

2

Wk 46. Why the compound pendulum called as ‘‘Compound

pendulum’’?

Tmk F\À Hß AÆÁõÖ AøÇUP¨£kQÓx?

7. Define centre of pressure.

Áøμ¯Ö AÊzu ø©¯®.

8. What is meta centric height?

ªuøÁU Põ¨¦¯μ® GßÓõÀ GßÚ?

9. What is length contraction?

}ÍU SÖUP® GßÓõÀ GßÚ?

10. What is relative velocity?

\õº¦z vø\÷ÁP® GßÓõÀ GßÚ?

Section B (5 5 = 25)

Answer all questions choosing either (a) or (b).

11. (a) Calculate the centre of gravity of right solid cone.

vs©U T®¤ß Dº¨¦ ø©¯zøuU PnUQkP.

Or

(b) Explain the working of friction clutch.

Eμõ´Ä Pmk¨£õmk ö£õÔ°ß ö\¯À£õmøh ÂÁ›.

12. (a) State and explain the Kepler’s laws of planetary motion.

÷PõÒPÎß C¯UPzvØPõÚ öP¨Í›ß ÂvPøÍU TÔ

ÂÍUSP.

Or

(b) Explain the Boy’s method for finding ‘G’.

Gß ©v¨ø£U PnUQkÁuØPõÚ £õ´ì ÷\õuøÚ

•øÓø¯ ÂÍUSP.

F–2483

3

Wk 413. (a) Define torque. How is it related to angular

momentum?

v¸¨¦ Âø\ GßÓõÀ GßÚ? ÷Põn E¢uzxhß Ax

GÆÁõÖ öuõhº¦øh¯x?

Or

(b) State and explain perpendicular axis theorem.

÷|ºUSzx Aa_z ÷uØÓzvøÚU TÔ ÂÍUSP.

14. (a) Explain stability of floating bodies.

ªuUS® ö£õ¸mPÎß {ø»zußø©ø¯ ÂÁ›.

Or

(b) State and prove Bernoulli’s theorem.

ö£º÷Úõ¼°ß ÷uØÓzøuU TÔ {¹¤.

15. (a) Write the postulates of special theory of relativity.

]Ó¨¦a \õº¤¯À öPõÒøPUPõÚ Gk÷PõÒPøÍ GÊxP.

Or

(b) Differentiate Galilean and Lorentz transformations.

P½¼¯ß ©ØÖ® »õμßì {ø»©õØÓa \©ß£õkPøÍ

÷ÁÖ£kzxP.

Section C (3 10 = 30)

Answer any three questions.

16. Derive the expression for stability of a body on a rough inclined plane.

J¸ ö\õμö\õ쨣õÚ \õ´uÍzvÀ EÒÍ J¸ ö£õ¸Îß

{ø»zußø©UPõÚ \©ß£õmøh Á¸Â.

F–2483

4

Wk 417. Explain the variation ‘g’ with height, depth and latitude

from the surface of earth.

¦Â°ß ÷©Ø£μ¨¤À C¸¢x, E¯μ®, BÇ® ©ØÖ® Am\

÷μøPø¯¨ ö£õÖzx ‘g’ß ©õÖ£õmøh ÂÍUSP.

18. How to determine the acceleration due to gravity using compound pendulum?

Tmk F\ø»¨ £¯ß£kzv ¦Â±º¨¦ •kUPzvøÚ GÆÁõÖ

PnUQkÁõ´?

19. Explain the determination of metacentric height of a ship by experiment.

P¨£¼ß ªuøÁU Põ¨¦¯μ® PnUQk® ÷\õuøÚø¯ ÂÁ›.

20. Derive the expression for Einstein’s most energy equivalence.

IßìjÛß {øÓ & BØÓÀ \©ß£õmøh Á¸Â.

————————

Wk 4

F–2484

B.Sc. DEGREE EXAMINATION, NOVEMBER 2019

Second Semester

Physics

THERMAL AND STATISTICAL PHYSICS

(CBCS – 2017 onwards)

Time : 3 Hours Maximum : 75 Marks

Section A (10 2 = 20)

Answer all questions.

1. Mention the advantages of Calendar and Barnes method.

Põ»shº ©ØÖ® £õºßì •øÓ°ß {øÓPÒ ¯õøÁ?

2. Define Cv and Cp.

Cv ©ØÖ® Cp – Áøμ¯Ö.

3. What do you understand from temperature — entropy diagram?

öÁ¨£{ø» – Gß÷μõ¤ Áøμ£hzv¼¸¢x }º AÔÁx

¯õx?

4. Mention the conditions of reversibility for any heat engine process.

öÁ¨£ G¢vμzvß ÷|º Gvº {PÌÄUPõÚ {£¢uøÚPÒ

¯õøÁ?

5. Write down the principle of regenerative cooling.

©ÖU SκÄUPõÚ `zvμzøu GÊxP.

Sub. Code 7BPH2C1

F–2484

2

Wk 46. List the properties of Helium I.

O® I–ß £s¦PÒ ¯õøÁ?

7. What is green house effect?

£_ø© Ãmk ÂøÍÄ GßÓõÀ GßÚ?

8. State Newton’s law of cooling.

{³mhß S뼀 Âv & Áøμ¯Ö.

9. Mention the relation between entropy and probability.

Gß÷μõ¤ ©ØÖ® {PÌuPÄ BQ¯ÁØÔUQøh÷¯ EÒÍ

öuõhºø£U TÖ.

10. What are bosons and fermions?

÷£õ\õß ©ØÖ® ö£ºª¯õßPÒ GßÓõÀ GßÚ?

Section B (5 5 = 25)

Answer all questions choosing either (a) or (b).

11. (a) Describe the determination of specific heat capacity of liquid by Calendar and Barne’s continuous flow method.

vμÁzvß uß öÁ¨£ Hئz vÓß PõqÁuØPõÚ

Põ»shº ©ØÖ® £õºßì öuõhº £õ¯ •øÓ°À PõsP.

Or

(b) Explain the determination of specific heat capacity of a gas at constant volume by Joly’s differential stream calorimeter.

áõ¼°ß ÷ÁÖ£õmk }μõ P÷»õ›©õÛø¯U öPõsk

©õÓõu £¸©ÛÀ, J¸ Áõ²Âß uß öÁ¨£ Hئz vÓß

PõqÁuØPõÚ ÷\õuøÚø¯ ÂÍUSP.

F–2484

3

Wk 412. (a) Discuss the change of entropy in reversible and

irreversible process.

Gß÷μõ¤ ©õØÓzvÀ, ÷|º Gvº ©ØÖ® ÷|º GvºÄÓõ

{PÌøÁ ÂÁõv.

Or

(b) What is thermodynamic third law? List the physical significance of entropy.

öÁ¨£ C¯UP¯¼ß ‰ßÓõ® Âvø¯U TÖ.

Gß÷μõ¤°ß £s¦PøÍU TÖ.

13. (a) Discuss the construction and working of Porous Plug experiment.

~s xøÍa ÷\õuøÚ°ß Aø©¨¦ ©ØÖ® ö\¯À£k®

ÂuzvøÚ ÂÁõv.

Or

(b) Explain the experimental method of liquefaction of oxygen.

BUêáß vμÁ©õUPÀ ÷\õuøÚ •øÓø¯ ÂÍUS.

14. (a) Illustrate the determination of specific heat of liquid by Newton law of cooling.

{³mhß S뼀 Âv öPõsk vμÁzvß uß öÁ¨£

Hئz vÓß PõqÁuØPõÚ ÷\õuøÚø¯ ÂÁ›.

Or

(b) Explain the determination of thermal conductivity of a bad conductor by Lee’s disc method.

A›vØPhzv°ß öÁ¨£U Phzx vÓøÚ ½&Ámk

•øÓ°À Põquø» ÂÍUS.

15. (a) Explain the theory behind the micro and macro states.

ø©U÷μõ (^μÍÄ) ©ØÖ® ÷©U÷μõ (÷£μÍÄ) {ø»PÎß

öPõÒøPø¯ ÂÁ›.

Or

F–2484

4

Wk 4 (b) Distinguish the MB, FD and BE statistics (any five

points).

MB, FD ©ØÖ® BE ¦ÒίÀPøÍ ÷ÁÖ£kzxP.

(HuõÁx I¢x ©mk®)

Section C (3 10 = 30)

Answer any three questions.

16. Determine the specific heat capacity of gas at constant pressure by Regnault’s method.

Áõ²Âß AÊzu® ©õÓõ uß öÁ¨£ Hئz vÓß

PõqÁuØPõÚ öμUÚõÀm ÷\õuøÚø¯ ÂÍUSP.

17. Describe the working of Carnot engine. Find its efficiency.

PõºÚõm G¢vμ® ÷Áø» ö\´uø» ÂÁ›. Auß £¯ÝÖ

vÓøÚU PõsP.

18. Obtain the expression for the fall in temperature by adiabatic demagnetization in a paramagnetic gas.

£õμõ Põ¢u Áõ²Âß öÁ¨£©õØÕhØÓ Põ¢u }UP •øÓ°À

öÁ¨£ SøÓÄUPõÚ ÷PõøÁø¯ öPõnºP.

19. Illustrate the construction and find the solar constant by water flow pyrheliometer.

}º FØÖ ø£÷μõ¼÷¯õ©õÛø¯U Aø©¨ø£U öPõsk `›¯

©õÔ¼ Põquø» ÂÍUS.

20. Obtain the expression of Fermi-Dirac distribution law.

ö£ºª&øhμõU ÂμÁÀ ÂvUPõÚ ÷PõøÁø¯ öPõnºP.

—————

Wk 3

F–2485

B.Sc. DEGREE EXAMINATION, NOVEMBER 2019

Second Semester

Physics

ELECTRICITY, MAGNETISM AND ELECTRO-MAGNETISM

(CBCS – 2017 onwards)

Time : 3 Hours Maximum : 75 Marks

Section A (10 2 = 20)

Answer all questions.

1. State Gauss theorem.

Põì ÷uØÓzvøÚU TÖP.

2. Give the principle of capacitor.

ªß÷uUQ°ß uzxÁzvøÚz u¸P.

3. Give two applications of electrolysis.

ªßÚõØ £S¨¤ß Cμsk £¯ß£õkPøÍz u¸P.

4. What is Peltier coefficient?

ö£Ài¯º SÚP® ¯õx?

5. Define coercivity.

Áøμ¯Ö : Põ¢u }USvÓß.

Sub. Code 7BPH2C2

F–2485

2

Wk 36. What do mean by hysteresis?

Põ¢uz u¯UP® GßÓõÀ GßÚ?

7. State Faraday’s law of electromagnetic induction.

ªßPõ¢uz ysh¾UPõÚ £õμ÷h Âv°øÚz u¸P.

8. What is self-inductance?

uß yshÀ GßÓõÀ GßÚ?

9. Define displacement current.

Áøμ¯Ö : Ch¨ö£¯ºa] ªß÷Úõmh®.

10. Define Hertz.

Áøμ¯Ö : öíºm_.

Section B (5 5 = 25)

Answer all questions, choosing either (a) or (b).

11. (a) Derive an expression for capacity of a parallel plate capacitor with dielectric medium.

J¸ CønzuPmk ªß÷uUQ°ß ªß÷uUS vÓÝUPõÚ

÷PõøÁø¯ Á¸Â.

Or

(b) Derive an expression for capacity of a spherical capacitor.

÷PõÍ ÁiÁ ªß÷uUQ°ß ªß÷uUS vÓÝUPõÚ

÷PõøÁø¯ Á¸Â.

12. (a) Explain the applications of electrolysis.

ªßÚõØ£S¨¤ß £¯ßPøÍ ÂÍUPÄ®.

Or

F–2485

3

Wk 3 (b) Explain the thermoelectric diagram and its uses.

öÁ¨£ªß Áøμ£hzvøÚ ÂÍUQ Auß £¯ßPøÍz

u¸P.

13. (a) Derive an expression for loss of energy due to hysteresis.

Põ¢u u¯UP PßÛ°ß ÷£õx HØ£k® BØÓÀ

CǨ¤ØUPõÚ ÷PõøÁø¯ Á¸Â.

Or

(b) Give the properties of ferromagnetic materials.

ö£÷μõ Põ¢u¨ ö£õ¸mPÎß £s¦PøÍz u¸P.

14. (a) Derive an expression for self inductance of a long solenoid.

}Í P®¤a_¸Îß uß yshÀ GsoØUPõÚ

\©ß£õmiøÚ Á¸Â.

Or

(b) Describe how condenser discharge through a resistance.

ªß÷uUQ J¸ ªßuøh ÁȯõP GÆÁõÖ ªßÛÓUP®

ö\´QÓx GߣuøÚ ÂÁ›.

15. (a) Give the theory of magnitude of displacement of current.

Ch¨ö£¯ºa] ªß÷ÚõmhzvØPõÚ öPõÒøP°øÚz

u¸P.

Or

(b) Derive an equation for Maxwell’s equations.

÷©UìöÁÀ \©ß£õmiøÚ Á¸ÂUPÄ®.

F–2485

4

Wk 3 Section C (3 10 = 30)

Answer any three questions.

16. Derive an expression for the capacity of a cylindrical capacitor.

E¸øÍ ÁiÁ ªß÷uUQ°ß ªß÷uUS vÓß Põq®

\©ß£õmiøÚ Á¸Â.

17. Describe the Gibb’s Helmholtz equation.

Q¨ì öíÀ®÷íõÀmì \©ß£õmiøÚ Á¸Â.

18. Give the properties of dia, para and ferromagnetic materials.

øh¯õ, £õμõ ©ØÖ® ö£÷μõ Põ¢u¨ ö£õ¸mPÎß £s¦PøÍ

u¸P.

19. Explain Rayleigh’s method to measure the coefficient of self inductance.

uß yshÀ Gs Põn EuÄ® μõ÷»°ß •øÓ°øÚ

ÂÍUPÄ®.

20. Explain the theory of electromagnetic waves.

ªßPõ¢u Aø»UPõÚ öPõÒøP°øÚ ÂÍUSP.

————————

sp4

F–2486

B.Sc. DEGREE EXAMINATION, NOVEMBER 2019

Third Semester

Physics

OPTICS AND SPECTROSCOPY

(CBCS – 2017 onwards)

Time : 3 Hours Maximum : 75 Marks

Part A (10 2 = 20)

Answer all questions.

1. How does spherical aberration minimize?

÷PõÍP ¤ÓÌa] GÆÁõÖ SøÓ¨£x?

2. What is the principle of direct vision spectroscope? Mention its importance.

÷|º £õºøÁ {Ó©õø»©õÛ°ß uzxÁ® GßÚ? Auß

•UQ¯zxÁzøu TÖP.

3. Determine the thickness of a thin plate by Michelson’s interferometer.

ø©UPÀ\ß SÖURmk©õÛ ‰»® J¸ umiß ui©øÚU Põs.

4. What is interference? How do you get fringes in air wedge?

SÖURmk ÂøÍÄ GßÓõÀ GßÚ? PõØÖ B¨¦ £møhPøÍ

GÆÁõÖ öPõnºÁõ´?

5. Write down the comparison between zone plate and convex lens.

©sh» umk ©ØÖ® S ÂÀø» BQ¯ÁØøÓ J¨¤kP.

Sub. Code 7BPH3C1

F–2486

2

sp 46. What is overlapping spectra?

÷©Øö£õ¸¢x {Ó©õø» GßÓõÀ GßÚ?

7. Define Polaroid. Mention its uses.

÷£õ»μõ´k – Áøμ¯Ö. Auß £¯ßPøÍ TÖ.

8. What is dextro and leavo rotatory?

Á»g _ÇØÔ ©ØÖ® Chg _ÇØÔ GßÓõÀ GßÚ?

9. What are microwave active and inactive?

~snø» ö\¯¼ ©ØÖ® ö\¯»ØÓx GßÓõÀ GßÚ?

10. State Raman effect. Mention its uses.

Cμõ©ß ÂøÍÄ – TÖ. Auß £¯ßPøÍU TÖ.

Part B (5 5 = 25)

Answer all questions, choosing either (a) or (b).

11. (a) Obtain the expression for dispersion without

deviation.

vø\ ©õØÓ©ØÓ {Ó¨¤›øPUPõÚ \©ß£õmøh

öPõnºP.

Or

(b) What is chromatic aberration? Explain the method

to achieve achromatism for two lenses separated by

a distance.

{Ó¨ ¤ÓÌa] GßÓõÀ GßÚ? C¸ ÂÀø»PÒ

CøhöÁÎöPõsk Aø©US®÷£õx {Ó¨¤ÓÌa]

}USuÀ •øÓø¯ ÂÍUS.

F–2486

3

sp 412. (a) Explain the determination of radius of curvature of

a lens by Newton’s rings.

}³mhß Áøͯ •øÓ°À ÂÀø»°ß ÁøÍÄ Bμ®

Põquø» ÂÍUSP.

Or

(b) Find the refractive index of a glass by Jamin’s interferometer.

Psnõi°ß JλPÀ Gs Põquø» á«ß

SÖURmk©õÛ ‰»® PõsP.

13. (a) Illustrate the theory of Fresnel’s diffraction at circular aperture.

Ámh xøÍ°À L¤μöÚ¼ß Âή¦ ÂøÍÄ

öPõÒøPø¯ ÂÁ›.

Or

(b) Explain the theory and experiment to determine the wavelength by plane diffraction grating.

J¸ \©uÍ RØÓÛø¯ öPõsk, Auß öPõÒøP ©ØÖ®

J롧 Aø»}»® Põquø» ÂÍUS.

14. (a) What is optical activity? Discuss the Fresnel’s explanation of optical activity.

Jΰ¯À ÂøÚ GßÓõÀ GßÚ? Jΰ¯À ÂøÚUPõÚ

L¤μöÚ¼ß ÂÍUPzøuU öPõk.

Or

(b) Deduce the expression for half wave plate and quarter wave plate.

Aøμ Aø»zumk ©ØÖ® PõÀ Aø»zumk

BQ¯ÁØÔß \©ß£õkPøÍz u¸Â.

15. (a) Explain the rotational spectra of rigid diatomic molecule. Mention its selection rule.

vs© Dμq ‰»UTÔß _ÇÀ {Ó©õø»UPõÚ ÂÍUP®

öPõk. Auß ÷uºÄ Âvø¯ öPõk.

Or

F–2486

4

sp 4 (b) Distinguish between microwave and infrared

spectroscopy.

~snø» ©ØÖ® AP]Á¨¦ {Ó©õø»°øÚ

÷ÁÖ£kzxP.

Part C (3 10 = 30)

Answer any three questions.

16. Explain the construction and function of Ramsden’s eyepiece with neat diagram.

μõ®ìjß PsnÖS P¸Â°ß Aø©¨¦ ©ØÖ®

÷Áø»ö\´²® ÂuzvøÚ öuÎÁõÚ £hzxhß ÂÍUS.

17. What is air wedge? Explain its theory. Discuss the determination of the thickness of a thin wire by this method.

PõØÖ B¨¦ GßÓõÀ GßÚ? Cuß öPõÒøP°øÚ ÂÍUPÄ®.

Cøu¨ £¯ß£kzv, J¸ ö©À¼¯ P®¤°ß ui©ß Põquø»

ÂÁõv.

18. Describe the determination of resolving power of a prism.

J¸ •¨£mhPzvß £SvÓß Põquø» ÂÁ›.

19. Define specific rotatory power. Explain the determination of specific rotatory power of a sugar solution using Laurent’s half shade polarimeter.

uß _ÇØ] vÓß – Áøμ¯Ö. \ºUPøμ Pøμ\¼ß uß _ÇØ]

vÓøÚ »õμß]ß Aøμ{ÇÀ ÷£õ»›«mhº öPõsk ÂÍUS.

20. Describe the classical and quantum theory of Raman effect. Find its conclusion.

Cμõ©ß ÂøÍÄUPõÚ £Ç[öPõÒøP ©ØÖ® SÁõsh®

öPõÒøPø¯ ÂÁ›. Auß •iÄPøÍ Põs.

–––––––––

Wk ser

F–2487

B.Sc. DEGREE EXAMINATION, NOVEMBER 2019

Fourth Semester

Physics

ATOMIC AND NUCLEAR PHYSICS

(CBCS – 2017 onwards)

Time : 3 Hours Maximum : 75 Marks

Section A (10 2 = 20)

Answer all questions.

1. Define critical potential.

©õÖ{ø» ªßÚÊzu® – Áøμ¯Ö.

2. Mention the properties of positive ray.

÷|ºPv›ß £s¦PøÍU öPõk.

3. What is Bohr magnetron? Calculate its value.

÷£õº ÷©PÚmμõß GßÓõÀ GßÚ? Auß ©v¨ø£ PnUQkP.

4. Find the fine structure of sodium D lines.

÷\õi¯® D Á›PÎß ~s Aø©¨ø£ Põs.

5. Define Mosley’s law. Mention its importance.

÷©õì÷» Âv – Áøμ¯Ö. Auß •UQ¯zxÁzøu TÖ.

Sub. Code 7BPH4C1

F–2487

2

Wk ser6. What are crystal and crystal lattice?

£iP® ©ØÖ® £iP AoU÷PõøÁ GßÓõÀ GßÚ?

7. List the laws of disintegration.

]øuÄUPõÚ ÂvPøÍU TÖ.

8. Define Geiger – Nuttal law.

øPPº – |mhõÀ Âv Áøμ¯Ö.

9. What is nuclear fusion? Give example.

AqUP¸ CønÄ GßÓõÀ GßÚ? GkuxUPõmk öPõk.

10. What are laptons and baryons?

ö»¨hõß ©ØÖ® ÷£›¯õßPÒ GßÓõÀ GßÚ?

Section B (5 5 = 25)

Answer all questions, choosing either (a) or (b).

11. (a) Write down the laws of photoelectric emission. Obtain the Einstein’s photoelectric equation.

J뻧 EªÌÄUPõÚ ÂvPøÍU TÖ. Ißìjß

J뻧 \©ß£õkPøÍ öPõnºP.

Or

(b) Explain the Lenard’s method to determine the e/m for photoelectron.

J뻧 Gö»UmμõÛß e/m Põq® ö»nõºk

÷\õuøÚø¯ ÂÍUSP.

F–2487

3

Wk ser12. (a) List and explain the various quantum numbers

associated with vector atom model.

öÁUhº Aq ©õv›UPõÚ öÁÆ÷ÁÖ SÁõsh®

GsPøÍ TÔ ÂÍUSP.

Or

(b) Define Zeeman effect. Obtain the Debye’s explanation of normal Zeeman effect.

^©ß ÂøÍÄ – Áøμ¯Ö. \õuõμn ^©ß ÂøÍÄUPõÚ

j÷£°ß ÂÍUPzøuU öPõk.

13. (a) Explain the experimental verification for change in wavelength by Compton’s theory.

Põ®hõß öPõÒøP°ß ‰»® Aø»}» ©õØÓzøu

Põs£uØPõÚ \›£õºzuÀ ÷\õuøÚø¯ ÂÍUS.

Or

(b) Discuss the analysis of continuous and characteristic X-ray spectrum.

X–Pv›ß öuõhº ©ØÖ® £s¦ Á› {Ó©õø»PøÍ

ÂÁõv.

14. (a) Explain the principle, construction and working of Wilson Cloud chamber. Mention its advantages.

ÂÀ\ß •QÀ P»Ûß uzxÁ®, Aø©¨¦ ©ØÖ® ÷Áø»

ö\´uø» ÂÍUSP. Auß •UQ¯zxÁzøu TÖ.

Or

F–2487

4

Wk ser (b) Define mean life. Deduce the expression to find the

mean life.

\μõ\› B²Ò GßÓõÀ GßÚ? AuØPõÚ ÷PõøÁø¯

öPõnºP.

15. (a) Write down the reactions for the source of stellar energy.

|m\zvμ BØÓ¼ß ‰»zvØPõÚ ÂøÚø¯ GÊxP.

Or

(b) (i) What is nuclear fission? Give example.

(ii) Consider single Helium nucleus formed by the fusion of two deuterium nuclei. Find the energy released from fusion reaction.

(i) AqUP¸ ¤ÍÄ GßÓõÀ GßÚ? GkzxUPõmk

öPõk.

(ii) AqUP¸ CønÄ ‰»® Cμsk i³mi›¯®

AqUPÒ J¸ O® AqUP¸øÁ

E¸ÁõUSQÓx GÛÀ, A¢u ÂøÚ¯õÀ

E¸ÁõS® BØÓø»U PõsP.

Section C (3 10 = 30)

Answer any three questions.

16. Describe the construction of Aston’s mass spectrograph. Explain how it is used to detect the isotopes. Mention its advantages and limitations.

Bìhõß {Ó©õø» Áøμ塧 Aø©¨ø£ ÂÁ›.

I÷\õ÷hõ¨ø£ PshÔ¯ Cx GÆÁõÖ £¯ß£kQÓx. Auß

£¯ßPÒ ©ØÖ® GÀø»PøÍU TÖ.

F–2487

5

Wk ser17. (a) Calculate the magnetic dipole moment of electron

due to orbital and spin motion.

(b) Describe the proof of vector atom model by Stern

and Gerlach experiment. Mention its important

results.

(A) _ØÖ¨£õøu ©ØÖ® _ÇØ]ø¯¨ ö£õ¸zx

Gö»UmμõÛß Põ¢u C¸ •øÚ v¸¨¦ vÓøÚU

PnUQkP.

(B) öÁUhº Aq ©õv›°ß {¹£Úzøu ìöhß – öPº»õa

÷\õuøÚ öPõsk ÂÁ›. Cuß •UQ¯zxÁzøuU TÖ.

18. State Bragg’s law. Obtain its mathematical form.

Describe how Bragg’s x-ray spectrometer is used to study

the crystal structure.

¤μõUì Âvø¯ TÖ. Auß PnURmøh öPõk. ¤μõUì

X–Pvº {Ó©õø»©õÛø¯ £¯ß£kzv GÆÁõÖ £iP

Aø©¨ø£ Põs£x Gߣøu ÂÁ›.

19. (a) What is beta ray? Mention its characteristics.

(b) Explain the construction and working of Betatron

as a beta particle accelerator.

(A) ¥mhõ Pvº GßÓõÀ GßÚ? Auß £s¦PøÍU TÖ.

(B) ¥mhõiμõÛß Aø©¨¦ ©ØÖ® Ax J¸ xPÒ

•kUQ¯õP ö\¯À£k® Âuzøu ÂÍUSP.

F–2487

6

Wk ser20. (a) Illustrate the function of nuclear reactor.

(b) Give a short explanation on cosmic rays.

(A) Aq Eø» ÷Áø» ö\´uø» ÂÁ›.

(B) PõìªU PvºPøͨ £ØÔ SÔ¨¦ ÁøμP.

————————

Wk 3

F–2488

B.Sc. DEGREE EXAMINATION, NOVEMBER 2019

Fifth Semester

Physics

ANALOG ELECTRONICS

(CBCS – 2017 onwards)

Time : 3 Hours Maximum : 75 Marks

Section A (10 2 = 20)

Answer all questions.

1. What is intrinsic semiconductor?

EÒÍõº¢u SøÓPhzv GßÓõÀ GßÚ?

2. What is meant by Zener breakdown?

ö\Úõº •ÔÄ GßÓõÀ GßÚ?

3. What do you understand by transistor biasing?

iμõß]ìhº \õº¦ £ØÔ }º AÔÁx GßÚ?

4. Obtain the relationship between and .

©ØÖ® CÁØÔØQøh÷¯¯õÚ öuõhº¤øÚ Á¸Â.

5. What is a single stage amplifier?

JØøÓ {ø»¨ ö£¸UQ GßÓõÀ GßÚ?

6. Define : Transformer.

Áøμ¯Ö : ªß©õØÔ.

Sub. Code 7BPH5C1

F–2488

2

Wk 37. What are the desirable properties of a power amplifier?

J¸ vÓß ö£¸UQ°ß ¸®£zuUP £s¦PÒ ¯õøÁ?

8. What are the advantages of positive feedback?

÷|º¨¤ßÞmhzvß ]Ó¨¦PÒ ¯õøÁ?

9. What is meant by virtual ground?

©õ¯zuøμ GßÓõÀ GßÚ?

10. What is a differential amplifier?

÷ÁÖ¨£õmk¨ ö£¸UQ GßÓõÀ GßÚ?

Section B (5 5 = 25)

Answer all questions, choosing either (a) or (b).

11. (a) Discuss the action of a bridge rectifier.

£õ» Aø»zv¸zv°ß ÷Áø»ø¯ ÂÁõv.

Or

(b) Explain the IV characteristics of NP Junction diode.

NP \¢v øh÷¯õiß IV £s¦PøÍ ÂÍUS.

12. (a) Draw and explain the characteristics of a transistor in Common Emitter mode.

ö£õx EªÌ¨£õß Aø©¨¤À EÒÍ iμõß]ìhº

JßÔß £s¦PøÍ Áøμ¢x ÂÍUS.

Or

(b) Discuss the action of a JFET.

JFET JßÔß ö\¯À£õmiøÚ ÂÁ›.

F–2488

3

Wk 313. (a) With a neat circuit diagram, explain the action of

direct coupled amplifiers. ÷|º Cøn¨¦ ö£¸UQ°ß öuÎÁõÚ ªß_ØÖ¨

£hzxhß Auß ö\¯À£õmiøÚ ÂÍUSP.

Or

(b) Write a note on the classification of amplifiers. ö£¸UQPÎß ÁøP¨£õmiøÚ £ØÔ SÔ¨¦ GÊx.

14. (a) Explain the action of a Push-pull amplifier and its advantages.

uÒÐ&CÊ ö£¸UQ°ß ö\¯À£õmiøÚ ÂÁ› ©ØÖ®

Auß |ßø©PøÍ ÂÍUSP.

Or

(b) Describe the principles of negative feedback in amplifier with diagram.

ö£¸UQ°ß GvºªßÞmhz uzxÁ® £ØÔ £hzxhß

ÂÁ›UPÄ®.

15. (a) Explain the action of operational amplifier as an adder.

J¸ ö\¯Ø£õmk¨ ö£¸UQ ö\¯À£k® Âuzøu

ÂÍUSP.

Or

(b) What are the characteristics of an ideal Op-Amp? C»m]¯ ö\¯Øö£¸UQ°ß £s¦PÒ ¯õøÁ?

Section C (3 10 = 30)

Answer any three questions.

16. What is Zener diode? Explain how a zener diode can be used as a voltage regulator.

ö\Úõº øh÷¯õk GßÓõÀ GßÚ? Ax GÆÁõÖ J¸

ªß÷Úõmh JÊ[S£kzv¯õP £¯ß£kzu¨£kQÓx GÚ

ÂÍUS.

F–2488

4

Wk 317. Describe voltage divider biasing of a transistor, with

necessary circuit diagram.

iμõß]ìhº JßÔß ªß÷Úõmh £S¨¦ •øÓ°øÚ uS¢u,

_ØÖ¨£hzxhß ÂÁ›.

18. Draw neat diagram of DC and AC circuits and explain working method.

DC ©ØÖ® AC _ØÖPøÍ Áøμ¢x Auß ÷Áø» ö\´²®

•øÓø¯ ÂÍUSP.

19. Describe the action of Hartely oscillator with circuit diagram and also obtain an expression for its frequency of oscillation.

J¸ íõºm¼ Aø»°¯ØÔ GÆÁõÖ ö\¯À£kQÓx Gߣøua

_ØÖ¨£hzxhß ÂÁ›zx Auß AvºöÁsqUPõÚ ÷PõøÁ

u¸ÂUPÄ®.

20. Explain how an operational amplifier acts a differentiator and an integrator.

ö\¯À£õmk ö£¸UQ JßÖ £S¨£õÚõPÄ® ©ØÖ®

öuõS¨£õÚõPÄ® GÆÁõÖ ö\¯À£kQÓx GߣuøÚ

ÂÍUSP.

————————

Wk 3

F–2489

B.Sc. DEGREE EXAMINATION, NOVEMBER 2019

Fifth Semester

Physics

COMPUTER PROGRAMMING IN C

(CBCS – 2017 onwards)

Time : 3 Hours Maximum : 75 Marks

Part A (10 2 = 20)

Answer all questions.

1. Write the rules to define a variable.

©õÔ&I {ÖÁ Âv•øÓPøÍ GÊx.

2. Write the syntax of printf function.

Printf \õº¤ß ö£õx ÁiÁ® GÊx.

3. What is the use of goto label statement?

goto label TØÔß £¯ß GßÚ?

4. Define an array.

Array Áøμ¯Ö.

5. What are the types of function?

\õº¤ß ÁøPPÒ ¯õøÁ?

6. What are external variable?

¦Ó ©õÔPÒ GßÓõÀ GßÚ?

Sub. Code 7BPH5C2

F–2489

2

Wk 37. How does a pointer variable initialized?

SÔö¯ß ©õÔ¼øÚ G[VÚ® ©v¨ø£ öPõk¨£´?

8. What is a structure?

Pmhø©¨¦ GßÓõÀ GßÚ?

9. What is a flow chart?

£õ´Ä¨£h® GßÓõÀ GßÚ?

10. Write an algorithm to find the average of set of numbers.

öPõkUP¨£mh GsPÎß \μõ\› Põn £i•øÓ JßÔøÚ

GÊxP.

Part B (5 5 = 25)

Answer all questions, choosing either (a) or (b).

11. (a) How will you define a symbolic constants in C? Explain with example.

C&{μ»õUP ö©õÈ°À EÒÍ Aøh¯õÍ ©õÔ¼ø¯

GÆÁõÖ {ÖÄÁõ´? Euõμnzxhß ÂÍUS.

Or

(b) Explain the structure of a C program.

J¸ C {μ¼ß Aø©¨ø£ ÂÁ›.

12. (a) Explain the purpose of “do...while” statement.

“do...while” TØÔß £¯ß£õmiøÚ ÂÍUSP.

Or

(b) Explain, how one dimensional array are declared and initialized in C language.

C ö©õÈ°À JØøÓ £›©õn•øÓ AoÁøPPÒ

GÆÁõÖ AÔÂUP¨£mk öuõh[P¨£kQßÓÚ Gߣøu

ÂÍUSP.

F–2489

3

Wk 313. (a) Explain how a function can be defined in C language

with its general form. C ö©õÈ°À, \õº¦ GÆÁõÖ Áøμ¯ÖUP¨£kQßÓx

Gߣøu Auß ö£õx ÁiÁzxhß ÂÍUSP..

Or

(b) Explain about automatic variable with example. uõÛ¯[Q ©õÔPÒ £ØÔ Euõμnzxhß ÂÍUSP.

14. (a) Explain the different between “Call by reference” and “Call by value”.

“Call by reference” ©ØÖ® “Call by value”

Cøh÷¯¯õÚ ÷ÁÖ£õkPøÍ ÂÍUSP.

Or

(b) Explain how will you declare a structure variable.

Pmhø©¨¦ ©õÔø¯ GÆÁõÖ AÔ¨£õ´ Gߣøu

ÂÍUSP.

15. (a) Write a C program to convert Celsius to Fahrenheit. Celsius¼¸¢x Fahrenheit&BP ©õØÖÁuØPõÚ

C ö©õÈ{μÀ JßÔøÚ GÊxP.

Or

(b) Write a C program to find the largest number of an array.

ArrayÀ EÒÍ ªP¨ö£›¯ GsønU Põs£uØPõÚ

C ö©õÈ {μÀ JßÔøÚ GÊxP.

Part C (3 10 = 30)

Answer any three questions.

16. Explain the various operators available in C.

C ö©õÈ°À EÒÍ £À÷ÁÖ C¯UQPøÍ ÂÁ›.

F–2489

4

Wk 317. Explain the various forms of “if” statement in C with

example.

C ö©õÈ°À EÒÍ £À÷ÁÖ “if” TÖPøÍ Euõμnzxhß

ÂÁ›.

18. Distinguish between the following :

(a) Actual and formal parameters

(b) Global and Local variables

(c) Automatic and static variables.

R÷Ç EÒÍøÁPøÍ ÷ÁÖ£kzvU Põmk

(A) Actual and formal parameters

(B) Global and Local variables

(C) Automatic and static variables.

19. Summarize the rules governing the declaration of a structure. Write the general format for declaring and initializing a structure. Explain with example.

Pmhø©¨¦ JßøÓ Aø©¨£uØPõÚ ÁÈPøÍ öuõSzx

EøμUPÄ®. Pmhø©¨¦ JßøÓ AÔ¨£uØS® ©ØÖ®

öuõh[SÁuØS® E›¯ ö£õx ÁiÁzøu GÊv,

Euõμnzxhß ÂÍUSP.

20. Write a C program to Add and Subtract of two matrices.

C¸ AoPøÍ TmhÄ® ©ØÖ® PÈUPÄ® ö\´ÁuØPõÚ

C ö©õÈ {μÀ JßÔøÚ GÊxP.

————————

Wk 3

F–2491

B.Sc. DEGREE EXAMINATION, NOVEMBER 2019

Fifth Semester

Physics

Elective — NON-CONVENTIONAL ENERGY SOURCES

(CBCS – 2017 onwards)

Time : 3 Hours Maximum : 75 Marks

Section A (10 2 = 20)

Answer all questions.

1. Why is there a need for non conventional sources of energy?

©μ¦\õμõ BØÓÀ ‰»[PÒ Hß ÷uøÁ¨£kQÓx?

2. What is a renewable energy?

¦x¨¤UPuUP BØÓÀ GßÓõÀ GßÚ?

3. Mention the types solar collectors.

`›¯ ÷\P›¨£õÛß ÁøPPÒ SÔ¨¤kP.

4. What are the advantages of solar energy sources?

`›¯ BØÓÀ ‰»[PÎß |ßø©PøÍ GÊxP.

5. List out the application of solar water heater.

`›¯ }º `÷hØÔ°ß £¯ßPøÍ u¸P.

Sub. Code 7BPHE1B

F–2491

2

Wk 36. What are the two problem associated with the use of solar

energy?

`›¯ BØÓÀ £¯ß£õmiß Cμsk ÁøP ¤μa\øÚPÒ

¯õøÁ?

7. What are the factors of wind energy?

PõØÖ BØÓ¼ß PõμoPÒ ¯õøÁ?

8. Define wind energy.

PõØÖ BØÓÀ Áøμ¯Ö.

9. What is Biological conversion of energy?

E°›¯À BØÓÀ ©õØÓ® GßÓõÀ GßÚ?

10. Define Photosynthesis.

Áøμ¯Ö JÎa÷\ºUøP.

Section B (5 5 = 25)

Answer all questions, choosing either (a) or (b).

11. (a) Explain Solar constant.

`›¯ ©õÔ¼ø¯ ÂÍUSP.

Or

(b) Explain commercial energy sources.

ÁºzuP BÓØÀ ‰»[PøÍ £ØÔ ÂÍUSP.

12. (a) Explain the working principle of concentrating collectors.

ö\ÔÅmh¨£mh ÷\P›¨£õß ö\¯À£k® Âuzøu

ÂÍUSP.

Or

F–2491

3

Wk 3 (b) Write notes on solar energy storages.

`›¯ BØÓÀ ÷\P›¨¤øÚ¨ £ØÔ GÊxP.

13. (a) Explain Box Type solar cooker.

ö£mi ÁøP `›¯ \ø©¨£õß £ØÔ ÂÍUSP.

Or

(b) Explain space heating.

öÁÎ öÁ¨£‰mhø» ÂÍUSP.

14. (a) Give the advantages and disadvantages of Geothermal power.

¦Â öÁ¨£ BØÓ¼ß |ßø© wø©PøÍ GÊxP.

Or

(b) Explain Basic components of WECS.

WECS ß Ai¨£øh £õP[PøÍ £ØÔ ÂÍUSP.

15. (a) Explain the production of energy from tides.

Aø»°ß ‰»® BØÓÀ E¸ÁõUSuÀ £ØÔ ÂÍUSP.

Or

(b) Explain working principles of small scale hydro electric system.

]Ô¯ ÁøP¯õÚ }º ªß Aø©¨¦ ö\¯À£k® Âuzøu

ÂÍUSP.

Section C (3 10 = 30)

Answer any three questions.

16. Discuss the energy sources and their availability.

BØÓÀ ‰»[PЮ Auß ÷uøÁPøͲ® £ØÔ ÂÁõv.

F–2491

4

Wk 317. Explain the working principle of flat plate collector.

\©uÍ umk ÷\P›¨£õß ÷Áø» ö\´²® Âuzøu ÂÍUSP.

18. Discuss the working principle of solar green house and also mention its advantages.

`›¯ £_ø© Ãk ÷Áø» ö\´²® Âuzøu ÂÁõv ÷©¾®

Auß |ßø©PøÍ u¸P.

19. What is Geothermal energy? Explain the estimation of its availability and the nature of geothermal energy fields.

¦Â öÁ¨£ BØÓÀ GßÓõÀ GßÚ? Auß C¸¨¦ ©v¨¥k,

¦Â öÁ¨£ BØÓ¼¸¨¤h[PÎß ußø© £ØÔ GÊxP.

20. Discuss Biogas generation with neat diagram and also mention its applications.

E°›¯À Áõ² E¸ÁõS® •øÓ°øÚ öuÎÁõÚ £hzxhß

ÂÍUSP. ÷©¾® Auß £¯ßPøÍ u¸P.

————————

Wk 3

F–2492

B.Sc. DEGREE EXAMINATION, NOVEMBER 2019

Fifth Semester

Physics

Elective — LASER PHYSICS AND FIBRE OPTICS

(CBCS – 2017 onwards)

Time : 3 Hours Maximum : 75 Marks

Part A (10 2 = 20)

Answer all questions.

1. List out the characteristics of LASER.

÷»\›ß £s¦PøÍ Á›ø\¨£kzx.

2. What is Stimulated emission?

ysh¨£mh EªÌÄ GßÓõÀ GßÚ?

3. Mention the different types of LASER.

÷»\›ß öÁÆ÷ÁÖ ÁøPPøÍ SÔ¨¤k.

4. Distinguish between a ruby laser and He-Ne Laser.

¹¤ ÷»\º ©ØÖ® O®&{¯õß ÷»\›ß ÷ÁÖ£õkPøÍz

u¸P.

5. Give any two applications of LASER in Medical field.

©¸zxÁz xøÓ°À ÷»\›ß H÷uÝ® Cμsk £¯ßPøÍ

u¸P.

Sub. Code 7BPHE1C

F–2492

2

Wk 36. What is Holography?

Holography GßÓõÀ GßÚ?

7. What do you mean by Optic fibre?

Jΰ¯À CøÇ Gߣx ¯õx?

8. Define Acceptance angle.

HئU ÷Põn® – Áøμ¯Ö.

9. What do you mean by splicing of fibres?

CøÇ Cøn¨¦ Gߣuß ö£õ¸Ò ¯õx?

10. Mention the advantages of fibre optic Communication.

CøÇ Jΰ¯À ö\´vz öuõhº¤ß £¯ß£õkPøÍ

SÔ¨¤kP.

Part B (5 5 = 25)

Answer all questions, choosing either (a) or (b).

11. (a) How population inversion is achieved in LASER? Explain.

÷»\›À, öuõøP uø»RÇõUP® GÆÁõÖ

\õzv¯¨£kQÓx? ÂÍUSP.

Or

(b) Write a short note on optical resonator.

Jΰ¯À JzuvºÁõß £ØÔ ]Ö SÔ¨¦ ÁøμP.

12. (a) Discuss in detail about the basic principle of LASER.

÷»\›ß, Ai¨£øh uzxÁzøu ›ÁõP ÂÁ›.

Or

F–2492

3

Wk 3 (b) Explain Semiconductor LASER.

SøÓPhzv ÷»\øμ ÂÁ›.

13. (a) Write a note on LASER as a diagnostic tool.

÷»\º – PshÔuÀ P¸Â Gߣx SÔzx ]Ö SÔ¨¦

ÁøμP.

Or

(b) Explain Holography interferometry in NDT.

NDT°À ÷íõ÷»Qμõ® SÔURmk ÂøÍÄ ©õÛø¯

ÂÁ›.

14. (a) What is acceptance angle? Derive a expression for acceptance angle.

HئU ÷Põn® GßÓõÀ GßÚ? HئU ÷Põn®

Põs£uØUPõÚ \©ß£õmiøÚ Á¸Â.

Or

(b) Write an essay about the losses of signal in optical fibre.

Jΰ¯À CøÇ°À HØ£k® CǨ¦Pøͨ £ØÔ

›ÁõP GÊxP.

15. (a) Write a note on photo detectors.

JÎ Psk¤i¨£õß £ØÔ SÔ¨¦ GÊx.

Or

(b) How will you measure the numerical aperture? Explain.

Gs vÓ¨ø£ GÆÁõÖ Aͨ£õ´ Gߣøu ÂÁ›.

F–2492

4

Wk 3 Part C (3 10 = 30)

Answer any three questions.

16. Derive the relation between the probabilities of spontaneous emission and stimulated emission in terms of Einstein’s coefficients.

Ißìøhß SnP® Á¸Âzx ußÛaø\¯õÚ EªÌÄ

ysh¨£mh EªÌÄPøÍ ÂÍUSP.

17. Explain with neat sketches, the principle, construction and working of a He-Ne Laser.

O®&{¯õß ÷»\›ß uzxÁ®, Pmhø©¨¦ ©ØÖ®

ö\¯Ø£k® Âuzøu, öuÎÁõÚ £hzxhß ÂÁ›.

18. Explain the applications of LASER in industry and Medical fields.

öuõÈØxøÓ ©ØÖ® ©¸zxÁ xøÓPÎÀ ÷»\›ß

£¯ß£õkPøÍ ÂÍUSP.

19. What is numerical aperture? Derive an expression for the numerical aperture.

Gs vÓ¨¦ GßÓõÀ GßÚ? Gs vÓ¨¦UPõÚ ÷PõøÁø¯

Á¸Â.

20. Describe the types of optical couplers.

Jΰ¯À Cøn¨£õÛß ÁøPPøÍ ÂÁ›.

————————

Wk 3

F–2493

B.Sc. DEGREE EXAMINATION, NOVEMBER 2019

Fifth Semester

Physics

Elective — COMMUNICATION ELECTRONICS

(CBCS – 2017 onwards)

Time : 3 Hours Maximum : 75 Marks

Section A (10 2 = 20)

Answer all questions.

1. What is Amplitude modulation?

Ãa_ Aø» £s÷£ØÓ® GßÓõÀ GßÚ?

2. Draw the spectrum of FM.

AvºöÁs £s÷£ØÓ {Ó©õø»ø¯ ÁøμP.

3. What is a demodulator?

Aø» £ß¤ÓUQ GßÓõÀ GßÚ?

4. Give the parameter of receiver.

Hؤ°ß PõμoPøÍ u¸P.

5. State the various Technology of Digital modulation.

£À÷ÁÖ ÁøP¯õÚ iâmhÀ £s÷£ØÓzvß

öuõÈØ~m£zøu u¸P.

Sub. Code 7BPHE2A

F–2493

2

Wk 36. What are the disadvantages of digital Communication?

iâmhÀ ö\´v öuõhº¤ß |ßø©PÒ GßÚ?

7. Define Topology.

Pmhø©¨¤¯À Áøμ¯Ö.

8. What is Downlink?

RÌ Cøn¨¦ GßÓõÀ GßÚ?

9. What are the types of fibre based on propagation of light?

JÎ £μ¨¤À Ai¨£øh°À JΰøÚ £õvUS® ÁøPPÒ

¯õx?

10. What is Athuation?

÷u´Ä Gߣx ¯õx?

Section B (5 5 = 25)

Answer all questions, choosing either (a) or (b).

11. (a) Explain Varactor diode FM modulator.

öÁμõUhº øh÷¯õk FM £ß÷£ØÔ ÂÍUSP.

Or

(b) Explain Vestigial side band system.

AiU_Ámk £UP AP» •øÓø¯ ÂÍUSP.

12. (a) Explain demodulation of PM.

PMß ¤ß¤ÓUPzvøÚ ÂÍUSP.

Or

(b) Discuss Phase looked loop.

Áøͯ {ø» ÷uõØÓzøu ÂÍUSP.

F–2493

3

Wk 313. (a) Explain ASK.

ASK ÂÍUSP.

Or

(b) List out advantages of Digital Communication.

iâmhÀ ö\´v öuõhº¤ß |ßø©PøÍ £mi¯¼kP.

14. (a) Discuss LAN.

LAN ÂÁõv.

Or

(b) Write notes on modem.

÷©õhzvøÚ £ØÔ SÔ¨¦ GÊxP.

15. (a) Explain single mode fibre.

JØøÓ Cøn ÁøP JÎ CøÇ°øÚ ÂÍUSP.

Or

(b) List out advantages of fibre.

JÎ CøÇ°ß |ßø©PøÍ £mi¯¼kP.

Section C (3 10 = 30)

Answer any three questions.

16. Describe Pulse width modulation.

xi¨¦ AP»® £ß÷£ØÓzøu ÂÍUSP.

17. Describe phase demodulation circuit operation for the peak and conversion detectors.

Pmh £ß¤ÓUQøh¯ £hzxhß ö\¯À£k® Âuzøu

ÂÍUSP.

F–2493

4

Wk 318. Describe the frequency shift keying.

FSK £ØÔ ÂÁõv.

19. Write short notes on :

(a) star topology

(b) hybrid topology.

SÔ¨¦ GÊxP :

(A) |m\zvμ Pmhø©¨¤¯À

(B) P»¨¦ Pmhø©¨¤¯À.

20. Describe optic fibre Communication with neat block diagram.

CøÇ Jΰ¯À ö\´v öuõhº¤øÚ öuÎÁõÚ £hzxhß

ÂÁõv.

————————

Wk 3

F–2495

B.Sc. DEGREE EXAMINATION, NOVEMBER 2019

Fifth Semester

Physics

Elective — SOLID STATE PHYSICS

(CBCS – 2017 onwards)

Time : 3 Hours Maximum : 75 Marks

Section A (10 2 = 20)

Answer all questions.

1. Define space lattice.

Áøμ¯Ö öÁÎ AoU÷PõøÁ

2. What is a primitive cell?

‰» A»S Tk GßÓõÀ GßÚ?

3. Define cohesive energy.

Áøμ¯Ö ¤øn¯À BØÓÀ.

4. What is a covalent bond?

\P ¤øn¨¦ GßÓõÀ GßÚ?

5. What is a ionic polarisation?

A¯o •øÚÁõUP® GßÓõÀ GßÚ?

6. Write down Clausius-Mossotti equation.

QÍõæ¯ì&ö©õ\õmi \©s£õmøh GÊxP.

Sub. Code 7BPHE2C

F–2495

2

Wk 37. What is an intrinsic semiconductor?

EÒÍõº¢u SøÓ Phzv GßÓõÀ GßÚ?

8. Define Hall effect.

íõÀ ÂøÍÄ Áøμ¯Ö.

9. Define critical temperature.

©õÖ{ø» öÁ¨£{ø» Áøμ¯Ö.

10. What is Josephson’s effect?

÷áõ\¨\ß ÂøÍÄ GßÓõÀ GßÚ?

Section B (5 5 = 25)

Answer all questions, choosing either (a) or (b).

11. (a) Explain the lattice parameters of an unit cell.

A»S Tmi¾ÒÍ AoU ÷PõøÁ AÍÃkPÒ ÂÁ›.

Or

(b) List out the important features of Miller indices.

ªÀ»º SÔPÎß •UQ¯¨ £s¦PøÍ £mi¯¼k.

12. (a) Explain ionic bond with example.

A¯Û¨¤øn¨ø£ Euõμnzxhß ÂÁ›.

Or

(b) Explain metallic bonds.

E÷»õP¨ ¤øn¨ø£ ÂÁ›.

13. (a) List out the physical properties of metals.

E÷»õPzvß C¯Ø¤¯À £s¦PøÍ £mi¯¼k.

Or

F–2495

3

Wk 3 (b) What are the postulates of free electron theory?

PmhØÓ G»Umμõß öPõÒøP°ß Gk÷PõÒPÒ ¯õøÁ?

14. (a) Mention the properties of semiconductor.

SøÓUPhzv°ß £s¦PøÍ SÔ¨¤kP.

Or

(b) What are the difference between intrinsic and extrinsic semiconductor?

y¯ ©ØÖ® ©õ_ P»¢u SøÓPhzvPÎøh÷¯²ÒÍ

÷ÁÖ£õkPÒ ¯õøÁ?

15. (a) Write down the properties of superconductors.

«UPhzvPÎß £s¦PøÍ GÊxP.

Or

(b) Explain Meissner effect.

ö©´ìÚº ÂøÍøÁ ÂÁ›.

Section C (3 10 = 30)

Answer any three questions.

16. Obtain an expression for the perpendicular distance between two parallel planes in a cubic crystal lattice.

PÚ \xμ £iP AoU÷PõøÁ°À C¸ Cøn uÍ[Qøh²ÒÍ

ö\[Szx öuõø»ÂØPõÚ ÷PõøÁø¯ Á¸Â.

17. Derive an expression for the cohesive energy of an ionic crystal.

A¯Û £iPzvß ¤øn¯À BØÓ¾UPõÚ ÷PõøÁø¯ Á¸Â.

18. Describe the different types of polarisation.

•øÚÁõUPzvß ÷ÁÖ£mh ÁøPPøÍ ÂÁ›.

F–2495

4

Wk 319. Explain the effects of electric field on N-type and P-type

semiconductors.

N-ÁøP ©ØÖ® P-ÁøP SøÓPhzvPÒ ªß¦»zuõÀ HØ£k®

ÂøÍÄPøÍ ÂÁ›.

20. Explain high temperature superconductors with example.

E¯º öÁ¨£{ø» «UPhzvPøÍ Euõμnzxhß ÂÁ›.

————————