2021Re SAP (20) MCQ ENG
Transcript of 2021Re SAP (20) MCQ ENG
ADVANCED LEVEL PHYSICS - AMITH PUSSELLA
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ADVANCED LEVEL - PHYSICS - AMITH PUSSELLA
AL/2021REVISION/THEORY /SAP 20
1. Choose the answer that correctly represents Stefan constant in SI units,
(1) Wm-2K-1 (2) Wm-2K-4 (3) mK (4) Wm-2 (5) m K-1
2. Height to which a liquid with an angle of contact θθθθθ1 rises, inside a capillary tube of cross sectional area A held
vertically, is h. When another liquid with an angle of contact θθθθθ2 is inside held vertically a capillary tube of cross
sectional area 2A , it rises to a height of h/2. Then,cos θθθθθ
1
equals to, (Surface tension and density of 1st liquidcos θθθθθ
2
are T1 and ρρρρρ
1 respectively, while those of 2nd liquid are T
2 and ρρρρρ
2 respectively&&&&&
(1) 2 ρρρρρ
1 T
2 (2) ρ ρ ρ ρ ρ
1 T
2 (3) √ √ √ √ √2 ρρρρρ
1 T
2 (4) 1 ρ ρ ρ ρ ρ
1 T
2 (5) 1 ρ ρ ρ ρ ρ
1 x
T1
ρρρρρ2 T
1 2 ρρρρρ
2 T
1 ρρρρρ
2 T
1 √ √ √ √ √2 ρρρρρ
2 T
1 √ √ √ √ √2 ρ ρ ρ ρ ρ
2 T
2
3. If specific latent heat of fusion of ice is 3.2 x 105 Jkg-1 and specific heat capacity of water is 4 x 103 Jkg-1K-1, required
mass of water at 1 0C temperature needed to convert 1 g of ice at 0 0C to 1g of water at 0 0C, in grams would be,
(1) 1 g (2) 1
g (3) 40 g (4) 80 g (5) 400 g 40
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Name
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4. A train moves toward a passenger standing near train platform, with uniform velocity, while sounding its horn Then
in sound as heard by the passenger,
(1) Intensity of sound as well as frequency gradually increase.
(2) Intensity of sound increases while frequency gradually decreases.
(3) Intensity of sound increases while frequency remains unchanged.
(4) Intensity of sound does not change while frequency gradually increases.
(5) Both sound intensity and frequency remain unchanged.
5. Variation of momentum (P) with time (t) of an object of mass
0.5 kg, with in 1st 8 seconds is as represented. Total distance it
has travelled with in the time from t = 0 to t = 8s is,
(1) 0 (2) 16 m (3) 32 m
(4) 64 m (5) 48 m
6. W is a horizontal uniform loop of wire and a current I is present in it,
towards anti-clockwise direction. A conductor is kept on two fixed smooth
wires, QR and ST which are in the same plane of wire loop. When a
current I passes through them as shown conductive wire would,
(1) move towards QS with an increasing velocity
(2) move towards RT with an increasing velocity
(3) move towards QS with an decreasing velocity
(4) move towards RT with an decreasing velocity
(5) move towards QS with a uniform velocity
7. A cane bridge constructed across a dam swings under time intervals of 5 seconds, because of the wind. Velocity of
transverse waves travelling along the bridge is estimated to be 400 ms-1. Length of the bridge that would cause the
highest risk , when bridge is oscillating in fundamental frequency would be,
(1) 20 m (2) 40 m (3) 80 m (4) 1000 m (5) 2000 m
8. Image of a point object O kept at a distance 10 cm, in front of a concave
lense is I. Now, when keeping a convex lense with the concave lense, point
image is created at a distance 5 cm from the lense combination on the other
side. Focal length of the convex lense would be,
(1) 2.5 cm (2) 5.0 cm (3) 7.5 cm
(4) 10 cm (5) 20 cm
9. Force of air resistance acting on a train moving with a velocity V is Fd = kV2 . When the train is moving on a horizontal
track with a uniform velocity of 50 ms-1 , driven force of train engine and power supplied by the engine in Newtons and
Watts respectively would be,
(1) 0 , 0 (2) 2500 k and 1.25 x 105 k (3) 1.25 x 105 k and 2.5 x 105 k
(4) 1.25 x 105 k and 2.5 x 106 k (5) 2500 k and 2.5 x 105 k
10. A small mark on the base of a travelling microscope (horizontal table of microscope) is focused on to cross wires of
microscope. When a glass block is kept on the mark, microscope had to be moved upwards a distance of 4.32 mm in
order to obtain a clear image on cross wires. Then, mark was removed and glass block was kept on the base and mark
was placed on top surface of the block. Then, microscope was moved upwards a distance of 10.38 mm from that
position to focus the image on to cross wires again. Refractive index of that glass block is,
(1) 14.70
(2) 14.70
(3) 10.38
(4) 6.06
(5) 10.38
4.32 10.38 4.32 4.32 6.06
t/s4 8
P/kg ms-1
W
I
Q
S
T
I
I
R
I
I
5 cm
10 cm
O
I
0
8
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11. Data about two spaces A and B are as given below.
Temperature R.H A.H Dew point
A 30 0C 60 % 24 gm-3 25 0C
B 25 0C 75 % 20 gm-3 23 0C
(A) Velocity of sound in space A is higher that in B.
(B) Absolute humidity at dew point is higher in space A than in B.
(C) People inside B feel more cold than people inside A.
True of the above.
(1) Only (A) and (B) (2) Only (B) and (C) (3) Only (A)
(4) All of the above (5) None of the above
12. Compressive Young's modulus of a human bone is 2 x 109 Nm-2 and 40 % of his total weight affects the lower bone
of a leg and minimum cross sectional area of this bone is 10 cm2. If length of the bone is 40 cm and compressive
extension is 5 x 10-5 m, mass of the human is,
(1) 80 kg (2) 75 kg (3) 62.5 kg
(4) 60 kg (5) 50 kg
13. Mean kinetic energy of a molecule of an ideal gas at 20 0C temperature is E. Temperature was increased upto 40 0C
and volume of the gas was doubled. Then, mean kinetic of a molecule of that gas is,
(1) E (2) 1.07 E (3) 2 E (4) 4 E (5) 2.14 E
14. Consider following statements regarding a light microscope.
(A) In normal adjustment, final image is always larger than the object.
(B) When forming final image at infinity, angular magnification is decided only by focal length of the lense.
(C) There is no special advantage in keeping the eye near the lense, when light microscope is in normal
adjustment.
True of the above,
(1) Only (A) (2) Only (A) and (B) (3) Only (A) and (C)
(4) All of the above (5) None of the above.
15. Fixed mass of an ideal gas engages in four processes A,B,C
and D as shown in the graph. Out of these, process where
∆∆∆∆∆Q = 0 would be,
(1) Only in A and D (2) Only in B and D
(3) Only in B (4) Only in A , B and D
(5) Only in C
P
V
A
D
B C
T4
T3
T2
T1
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16. Four current balances are represented in following figures. Those which could be seen slanted, when a current
passes through the balances would be,
(1) Only (a) and (b) (2) Only (b) and (c) (3) Only (b) and (d)
(4) Only (c) (5) Only (d)
17. A fishermen on land expects to catch a fish using a spear.
Positions of the fish, sea anemone , crab and oyster shell
are represented in the diagram. At that moment, spear
could hit the fish, if he aims to the position of,
(A) Crab as seen through water.
(B) Sea anemone as seen through water.
(C) Oyster shell as seen through water.
True of the above could be,
(1) Only (B) (2) Only (A) and (B)
(3) Only (A) and (C) (4) All of the above
(5) None of the above
18. In order to release kinetic energy of a system completely after a perfectly inelastic collision, collision should be
happened in a way in which,
(1) magnitudes of momentums of two objects before collision are equal and opposite in direction.
(2) masses of two objects are equal.
(3) velocities of two objects are equal.
(4) speeds of two objects are equal and opposite in direction.
(5) both objects have the same kinetic energy.
19. Electric field intensity at a certain region of space is zero. Accordingly, statement that could be said for certain, about
electric potential at that region would be,
(1) it is equal to zero. (2) it is a constant value.
(3) it is a positive potential with a constant value. (4) it is negative potential with a constant value.
(5) it is a region where (-) and (+) potentials with equal magnitudes are present at either sides.
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1234123412341234123412341234
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I
I
I
I
I
N
S
NS
I
I
II
I
I
I
I
I
I
I
II
I
I1
I1
I1
I1
(a) (b)
(c) (d)
Oyster shellSea anemone
Fish
Crab
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20. When there is a potential difference of V between two horizon-
tal parallel plates, a (-) charged particle P remains stationary at
its middle. Now, when increasing the potential difference V,
particle P moves towards the upper plate and when decreasing
the potential difference V, it moves towards the lower plate.
Choose the correct statement regarding this.
(1) When increasing V, both gravitational potential energy and electric potential energy of P get increased.
(2) When increasing V, both gravitational potential energy and electric potential energy of P get decreased.
(3) When decreasing V, both gravitational potential energy and electric potential energy of P get decreased.
(4) When decreasing V, both gravitational potential energy and electric potential energy of P get increased.
(5) When increasing V, increment of gravitational potential energy is equal to the decrement of electric potential
energy, of P.
21. First, two rods (1) and (2) which are made of different materials but
have the same dimensions, are connected in series, lagged well and
its ends are kept in steady temperatures of T1 and T
2 . Then, they
are connected in parallel, lagged well and its ends are also kept in
steady temperatures of T1 and T
2. When thermal conductivity of
material (1) is k and that of (2) is 3k,
Rate of heat flow when connected in series equals to,
Rate of heat flow when connected in parallel
(1) 1
(2) 2
(3) 3
(4) 2
(5) 3 6 9 16 5
22. Equivalent resistance between A and B of the given system
would be,
(1) 3 R (2) 4 R (3) 2 R
(4) R (5) 5 R
23. In a circuit regulated using a zener diode, VZ = 30 V and
IZ = 4 mA. Current I through R
1 and resistance of load resistor
RL would be,
(1) 4 mA , 80 kΩΩΩΩΩ (2) 5 mA , 30 kΩΩΩΩΩ(3) 3 mA , 50 kΩΩΩΩΩ (4) 8 mA , 30 kΩΩΩΩΩ(5) 5 mA , 80 kΩΩΩΩΩ
24. As shown in the figure, two boards, each of weight 300 N are
kept on a horizontal floor, such that they are vertically balanced
making angles of 450 with the vertical. Static frictional force
acting on a board by the floor is,
^Consider that, sin 450 = cos 450 = 0.7 & & & & &
(1) 300 N (2) 150 N (3) 450 N
(4) 250 N (5) 375 N
P V
1 2
X X X X X X X X X X
X X X X X X X X X X
X X X X X X X X X XX X X X X X X X X X
1
2
X X X X X X
X X X X X X
X X X X X X
T2
T1
T2
T1
A B
C
D
R
RR
R
R
RR
RR
R
R
R
R1 = 10 kΩΩΩΩΩ
I
VIN
= 80 V
RL
IZ= 4mA
VZ
= 30V
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450450
E F G
R R
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25.
AB is a wire of uniform cross section and V is an ideal zero
centre voltmeter. When plotting a graph for variation of
voltmeter reading with l0, its rough shape is as represented
below.
Total length of wire AB is L. Consider following statements
regarding this.
(A) R2 = 2 R
1
(A) When value of L0 becomes L/2, current through R
2
becomes higher the current through R1.
(B) l0 = L/4, current through R
2 becomes lower the current
through R1.
True of the above,
(1) Only (A) (2) Only (A) and (B)
(3) Only (A) and (C) (4) All of the above (5) None of the above
26. Choose the diagram that shows torque and force acting on the front wheel of a Front Wheel Drive car (in which, front
wheel is the driven wheel) under the times, when it is gradually coming to rest by applying brakes and then
accelerating forward again would be,
27. Circuit on right side contains three diodes D1 , D
2 and D
3 and a
resistor R. Variations of potentials V1 , V
2 and V
3 with time are
shown in following graphs.
V
l0
A BD
C
R1
R2
Voltmeter
Reading
l0
Applying brakes accelerating
(1) (2) (3)
(4) (5)
V0RV
3
V2
V1 D
3
D2
D1
+
+
+
V1
3 6 t/ms0
V2
3 6 t/ms0
V3
3 6 t/ms0
L/3 L
Applying brakes accelerating Applying brakes accelerating
Applying brakes accelerating Applying brakes accelerating
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Here, shape of the graph that shows variation of V0 (output voltage) with time, under the time of 6 ms that is taken for
a single cycle would be,
28. As shown in the figure, a coil ABCD of area 20 cm2 containing
300 turns rotates at a constant rate of 10 rotations per minute.
If direction of rotation is as represented, maximum value of
induced electro motive force across the loop and then, direction
of induced current would be, (magnetic flux density B = 50 mT.)
(πππππ = 3)
(1) 0.02V , in the direction ABCD
(2) 0.02V , in the direction DCBA
(3) 0.03V , in the direction ABCD
(4) 0.03V , in the direction DCBA
(5) 0.06V , in the direction ABCD
29. Motions of three particles p, q, r inside a uniform magnetic field are as represented. Their velocities are vp, v
q and v
r.
Time periods of their circular motions inside the field are tp, t
q and t
r. If magnitudes of charges and masses of all
three particles are equal, choose the correct statement out of the following.
Particle with the Particle with the longest Positively charged
highest velocity time period particle/particles
(1) p p Only q and r
(2) q r Only q and r
(3) p Only p and q
(4) p Only p
(5) q r Only p and r
V0
3 6 t/ms0
(1)
V0
3 60
(2)
V0
3 60
(3)
V0
3 60
(4)
V0
3 60
(5)
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CB
NS
X X X X X X
X X X X X X
X X X X X X
X X X X X X
X X X X X X
p
r
a/2 a
q
t/ms
t/ms t/ms
t/ms
a
rTime periods of all three particlesare the same
Time periods of all three particlesare the same
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30. A well bouncing rubber ball is released freely, from a position where the
height from ground to the highest point (X) of the ball is H. Since then, shape
of the graph that shows the variation of vertical height to the point X (highest
point of the ball) from the ground with time, until the ball leaves the contact
with ground for the 1st time after striking the ground would be,
31. A small electricity power station generates electricity with a power of 2 MW. Then, potential difference is increased
up to 40 kV by a step-up transformer and it is supplied to a sub-station. If total resistance of those wires is 2 ΩΩΩΩΩ,
percentage of the ratio between rate of energy wastage as heat by the wires and rate of electricity generation is,
(1) 2 % (2) 1 % (3) 0.1 % (4) 0.25 % (5) 0.5 %
32. Resistance of wire AB of the given potentiometer cir-
cuit is 2R. When k is opened, while keeping the resis-
tance of variable resistor as R, obtained balanced length
was l0. If total length of the wire L = 2 l
0 and balanced
length obtained when k is closed is 3l0/4, internal resis-
tance of the cell equals to,
(1) R
(2) R
(3) R
1
2 3 3
(4) R
1 (5) R
1
2 4
(Highest point of the
ball)
H
t
(1)
0 t
(2)
0
t
(3)
0 t
(4)
0 t
(5)
0
40 kV
Power Station Total resistance
of wires is 2 ΩΩΩΩΩSub Station
↑↑↑↑↑
A B
E0
R (Variable resistor)
E1 , r
k
R1
C
X
2 MW
l0
h h
h h h
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33. Number of antinodes obtained in stationary wave of A is one less than the obtained number of nodes. While, number
of antinodes obtained in stationary wave of B is one higher than the obtained number of nodes. A and B respectively
could be,
(1) a taut wire, a tube in which one end is closed.
(2) a tube in which one end is closed, a tube in which both ends are opened.
(3) a tube in which both ends are opened, a taut string.
(4) a taut string, a tube in which both ends are opened.
(5) a tube in which one end is closed, a taut string.
34. In order to raise a roller over an edge, a man exerts a force towards a direction
inclined at an angle θ θ θ θ θ to the horizontal as shown in the diagram. If force exerted
by the man along the string, which is required to scarcely raise this roller from
the ground is F, graph that represents the variation of this force F with angle θθθθθunder the range 00 to 900 would be,
35. When water and oil of density 750 kgm-3 are present inside a U-
tube, height of the oil column is 5.00 cm. Now, when top of the
right arm containing oil is covered (in such way that wind cur-
rent supplied to left arm doesn't affect the right arm) and a wind
current of velocity υυυυυ is created above the left arm, top levels of
both liquids got equal. If density of air is 1.3 kgm-3, equation that
gives the magnitude of υ υ υ υ υ would be,
(1) υ υ υ υ υ = 2.5 x 102
(2) υυυυυ =1.25 x 750
1.3 1.3 x 1000
(3) υυυυυ = 2.5 x 7.5 x 10
(4) υυυυυ = 1.3 x 750
1.3 1.25 x 1000
(5) υυυυυ = 1.3 x 102
2.5
36. Meter shown at right side contains a linear scale. When X and
Y are open, it shows a reading of 20 scale units. When a resis-
tor of resistance 2000 ΩΩΩΩΩ is connected between X and Y, reading
of the meter would be,
(1) 5 (2) 10 (3) 25
(4) 28 (5) 40
37. A student suggests following methods to increase the efficiency of a transformer.
(A) Using solid soft iron block instead laminated metal slats.
(B) Using wires with higher thickness for wrapping coils.
(C) Using wires with lower resistivity for coils.
True of the above,
(1) Only (A) and (B) (2) Only (B) and (C) (3) Only (A) and (C)
(4) All of the above (5) None of the above
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θ
F
0 45 90
(1)
θθθθθ
F
0 45 90
(2)
θθθθθ
F
0 45 90
(3)
θθθθθ
F
0 45 90
(4)
θθθθθ
F
0 45 90
(5)
θθθθθ
5 cm5 cm
Oil
Water
cover
υ
→→→→→
5 ΩΩΩΩΩ
2995 ΩΩΩΩΩ 2000 ΩΩΩΩΩ
r = 0
1.5 VX
Y
Meter
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38. A conductor with two different thicknesses is made according to the
measurements shown. When making a portion of diameter D/2 with
one uniform thickness using this conductor, such that its volume doesn't
change how many times is the resistance of new portion than the resis-
tance of initial compound portion?
(1) 16 times (2 ) 32 times (3) 64 times
(4) 128 times (5) 256 times
39. Near the edge of a circular table, there is a small wooden block
and a coin is on the wooden block, as shown in the figure.
µµµµµs = 0.3 and µµµµµ
k = 0.2 between the coin and the wooden block.
µµµµµs = 0.5 and µµµµµ
k = 0.4 between the wooden block and the circular
table. If ωωωωω0 0 0 0 0 is the maximum angular velocity that the circular
table could have for the above coin or the wooden block to remain
without slipping, ωωωωω0 0 0 0 0 equals to,
(1) √√√√√2 rads-1 (2) 2 rads-1 (3) √√√√√3 rads-1
(4) √√√√√5 rads-1 (5) 5 rads-1
40. When obtaining a fixed reading by connecting an ideal voltmeter V
between ab, while keeping S open in the given circuit and then,
when obtaining a fixed reading between ab , using V while
keeping S closed,
Reading when S is opened equals to,
Reading when S is closed
(1) 2
(2) 1
(3) 1
(4) 2 (5) 3 3 2 3
41. In a spectrometer, 30 Vernier divisions coincide with 29 divisions of 1/20 of main circular scale. Using this, in order
to find minimum deviation of a prism, first reading R1 corresponding to the position of telescope when it is exactly in
front of the collimator and reading R2 corresponding to the instance obtained by rotating the telescope until minimum
deviation is found by keeping the prism are as represented below. Accordingly, angle of minimum deviation would be,
(1) 280 221 (2) 3500 521 (3) 3220 301 (4) 370 301 (5) 1610 151
42. A transverse wave pulse is formed by creating a single peri-
odic transverse motion from the front end of a taut string,
and it moves towards right. This pulse takes a time of t0 to
reach the other end. This to could be decreased by,
(1) decreasing the time taken to create this pulse, without
changing its amplitude of oscillation.
(2) creating the pulse slowly, without changing its amplitude of oscillation.
(3) increasing the amplitude of oscillation without changing the time taken to create the pulse.
(4) oscillating another string with the same length, under same tension, but having a higher weight, without changing
the amplitude or time.
(5) oscillating another string with the same length, under same tension, but having a lower weight, without changing
the amplitude or time.
r = 1m
Circular
table
Co in
Wooden
block
V
V0
C
2 C
3 C
S
a
b
30
20 10
0
300 290280
Coincident line
Reading R1
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2D D
L
L
3520
3500
3510
30
20 10
0
Coincident line
Reading R2
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43. A satellite orbits around earth along an elliptical path and furthest distance to earth from that path is four times that
of the nearest distance. If its kinetic energy at nearest position is E , its kinetic energy at furthest position would be,
(1) E (2) E
(3) 4 E (4) E
(5) 16 E 4 16
44. In the circuit shown in right side, resistance of variable resistor R1 is
changed from zero to infinity. Then, graph that correctly represents
variation of value of potential V0 at Y relative to X , with R
1 would be,
45. When supplying heat to two liquids A and B with a uniform rate, variation of temperature occurred with time was as
represented in the graph.
IfSpecific latent heat of vaporization of liquid A
=3
Specific latent heat of vaporization of liquid B 4
Specific heat capacity of liquid A equals to,
Specific heat capacity of liquid B
(1) 4
(2) 6
(3) 5
3 5 6
(4) 5
(5) 4
4 5
46. If r = 0 in all cells, potential at X relative to B, when switch S is open
would be,
(1) + 6 V (2) + 3 V (3) - 3 V
(4) - 2 V (5) + 1 V
0 20 40 120 130
20
50
60
Temperature/0C
time/s
1 0 ΩΩΩΩΩ 1 0 ΩΩΩΩΩ
1 0 ΩΩΩΩΩ
4V 3V
2V
D1 0 ΩΩΩΩΩE
CF
BA
X2V
S
+ 15V
R
R
R1
R
Y
X
V = 0
V0
R R1
0
5
3
(3)
V0
R R1
0
5
3
(4)
V0
R
R1
0
5
3
(5)
-3
-5
V0
R R1
0
-5
-3
(1)
V0
R0
-5
-3
(2)
R1
A
B
ADVANCED LEVEL PHYSICS - AMITH PUSSELLA
- 12 -
ADVANCED LEVEL - PHYSICS - AMITH PUSSELLA
AL/2021REVISION/THEORY /SAP 20
47. As shown in the figure, water falls to the container from the tap (under
constant rate). Water exits through a horizontal tube fixed to this con-
tainer and a vertical tube is connected in middle, in order to keep the
water level constant. Now, the tube is gradually inserted to water hori-
zontally with a constant velocity. Graph that shows the rough shape of
variation of pressure difference (∆∆∆∆∆P) between points A and B with time
would be,
48. One fourth of a cylindrical glass block is kept on a table as shown in
the diagram. In order for a ray striking perpendicular to one plane,
to incident at a point outwards from D on the table, in the value of
n,
(1) minimum could be 1
(2) maximum could be 1
sin 40 sin 40
(3) minimum could be 1
(4) maximum could be 1
(5) maximum could be 1
sin 50 sin 50 sin 45
49. At an instance where a +Q charge is given to a conduc-
tive sphere X, an unchanged conductive small sphere Y
is brought near X from infinity, as shown in the figure.
Then point where electric field intensity is maximum,
out of the five given points would be,
(1) A (2) B (3) C
(4) D (5) E
50. Planes of two circular wire loops P and Q are parallel and a uniform mag-
netic field acts perpendicularly away from those planes. Area of loop P is
0.2 m2 and that of loop Q is 0.4 m2. When decreasing magnetic flux density
with a uniform rate of 2.5 Ts-1 , potential at Y relative to X would be,
(1) - 1.0 V (2) - 0.5 V (3) + 1.0 V
(4) + 0.5 V (5) - 1.5 V
∆∆∆∆∆ P∆∆∆∆∆ P∆∆∆∆∆ P∆∆∆∆∆ P
A B
t
∆∆∆∆∆ P
(5)t
(4)t
(3)t
(1)
exiting water
D
n
YEDBA
X
+Q
C
t
(2)
B
P
X
Y
Q
500