LT NEET GRAND TEST- 25

DURATION: 180 Minutes DATE: 02.05.2025 MARKS: 720

PHYSICS
1. The bulk modulus of a liquid is 3 x 1010 Nm-2. The pressure required to reduce the volume
of liquid by 2% is :
(a) 3 x 108 Nm-2 (b) 9 x 108 Nm-2 (c) 6 x 108 Nm-2 (d) 12 x 108 Nm-2

2. The average translational energy and the rms speed of molecules in a sample of oxygen at
300K are 6.21 x 10-21J and 484 m/s respectively. The corresponding values at 600K are
nearly (assuming ideal gas behaviour).
(a) 12.42 x 10-21J, 968 m/s. (b) 8.78 x 10-21J, 684m/s
(c) 6.21 x 10-21J, 968 m/s (d) 12.42 x 10-21J, 684 m/s

3. P-T graph of ideal monoatomic gas is given as shown in figure. The corresponding P-V
diagram is

(a) (b) (c) (d)

4. In a given process of an ideal gas, dW = 0 and dQ< 0. Then for the gas –
(a) The temperature will decrease
(b) The volume will increase
(c) The pressure will remain constant
(d) The temperature will increase

5. Two point charges q and –q are at positions (0, 0, d) and (0, 0, –d) respectively. What is the
electric field at (a, 0, 0) ?
2 qd qd
2 2 3/2
k^ 2 2 3/2
k^
4 πε 0 (d + a ) (b) 4 πε 0 (d + a )
(a)

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 −2 qd −qd
2 2 3/2
k^ 2 2 3/2
k^
(c) 4 πε 0 (d + a ) (d) 4 πε 0 (d + a )

6. A charge –q is placed at (0, 0, – z) where z << a. On releasing –q

from this position–
(a) – q will move towards z = – 
(b) – q will move towards z = 
(c) – q will move to and fro about the origin
(d) – q will remain stationary at (0, 0, – z)

7. How the seven condensers, each of capacity 2F, should be connected in order to obtain a

resultant capacitance of F?

(a) (b) (c) (d)

8. A long solenoid has 200 turns per cm and carries a current of 2.5 A. The magnetic field at
its centre is [0 = 4 10–7Wb/m2]
(a) 3.14  10–2Wb/m2 (b) 6.28  10–2Wb/m2
(c) 9.42  10–2Wb/m2 (d) 12.56  10–2Wb/m2

9. A proton and an α − particles enters in a uniform magnetic field with same velocity, then
ratio of the radii of path describe by them
(a) 1 : 1 (b) 1 : 2 (c) 2 : 1 (d) None of these

10.Given below are two statements:

Statement I: Out of microwaves, infrared rays and ultraviolet rays, ultraviolet rays are the
most effective for the emission of electrons from a metallic surface
Statement II: Above the threshold frequency, the maximum kinetic energy of
photoelectrons is inversely proportional to the frequency of the incident light In the light of
above statements, choose the correct answer from the options given below
(a) Statement-I is true and Statement-II is false
(b) Statement-I is false and Statement-II is true
(c) Both S-I and S-II are true
(d) Both S-I and S-II are false.

11.Shown in figure here is a convergent lens placed inside a cell filled with a liquid. The lens
has focal length +20 cm when in air and its material has refractive index 1.50. If the liquid
has refractive index 1.60, the focal length of the system is

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 (a) + 80 cm (b) – 80 cm (c) – 24 cm (d) – 100 cm

12. A prism of refractive index  and angle A is placed in the minimum deviation position. If
the angle of minimum deviation is A, then the value of A in terms of  is -

(b) sin √
(a) sin
( 2μ )
–1 ( )
–1
μ–1
2 (
(c) 2cos 2
–1
μ
) (d) cos
( 2μ )
–1

13. If the focal length of the objective lens is increased then

(a) Magnifying power of microscope will increase but that of telescope will decrease
(b) Magnifying power of microscope and telescope both will increase
(c) Magnifying power of microscope and telescope both will decrease
(d) Magnifying power of microscope will decrease but that of telescope will increase

14. A zener diode is to be used as a voltage regulator. Identify the correct set up –

(a) (b)

(c) (d)

15. The logic circuit shown below has the input waveforms ‘A’ and ‘B’ as shown. Pick out the
correct output waveform.

(a) (b)

(c) (d)

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16. E, m, l and G denote energy, mass, angular momentum and gravitational constant
El 2
5 2
respectively, then the dimension of m G are
(a) Angle (b) Length (c) Mass (d) Time

17. The percentage errors in measurement of mass and speed are 3 % and 2% respectively. The
error in kinetic energy will be-
(a) 6% (b) 7 % (c) 10% (d) 12%

18. The length of an object is measured using a vernier system whose main scale is 30 cm long
with 600 divisions. If 19 divisions of the main scale coincide with 20 divisions of the
vernier scale, then its least count is
(a) 0.25 cm (b) 0.025 cm (c)0.35 cm (d) 0.025 mm

19. Which one of the following represents displacement-time graph of two objects A and B
moving with zero relative velocity?

(a) (b) (c) (d)

20. Ice starts forming in lake with water at 0 0C and when the atmospheric temperature is
– 100C. If the time taken for 1 cm of ice be 7 hr, then the time taken for the thickness of ice
to change from 1 cm to 2 cm is
(a) 7 hrs (b) 14 hrs (c) Less than 7 hrs (d) More than 7 hrs

21. An electric kettle takes 4A current at 220V. How much time will it take to boil 1 kg of
water from temperature 20°C ? The temperature of boiling water is 100°C :
(a) 6.3 min (b) 8.4 min (c) 12.6 min (d) 4.2 min

22. A planet of mass M, has two natural satellites with masses m 1 and m2. The radii of their
circular orbits are R1 and R2 respectively. Ignore the gravitational force between the
satellites. Define v1, L1, K1 and T1 to be, respectively, the orbital speed, angular
momentum, kinetic energy and time period of revolution of satellite 1; and v 2, L2, K2 and
T2 to be the corresponding quantities of satellite 2. Given m 1/m2 = 2 and R1/R2 = 1/4, match
the ratios in List-I to the numbers in List-II.
List-I List-II

P. 1.

Q. 2. 1

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 R. 3. 2

S. 4. 8

(a) P → 4; Q → 2; R → 1; S → 3
(b) P → 3; Q → 2; R → 4; S → 1
(c) P → 2; Q → 3; R → 1; S → 4
(d) P → 2; Q → 3; R → 4; S → 1
23. STATEMENT-1: An astronaut in an orbiting space station above the Earth experiences
weightlessness. and
STATEMENT-2: An object moving around the Earth under the influence of Earth's
gravitational force is in a state of 'free-fall.
(a) STATEMENT -1 is True, STATEMENT -2 is True; STATEMENT -2 is a correct
explanation for STATEMENT -1
(b) STATEMENT -1 is True, STATEMENT -2 is True; STATEMENT -2 is NOT a correct
explanation for STATEMENT -1
(c) STATEMENT -1 is True, STATEMENT -2 is False
(d) STATEMENT -1 is False, STATEMENT -2 is True.

24. A body of mass M at rest explodes into three pieces, in the ratio of masses 1:1:2. Two
smaller pieces fly off perpendicular to each other with velocities of 30 ms -1 and 40 ms-1
respectively. The velocity of the third piece will be :
(a) 15 ms-1 (b) 25 ms-1 (c) 35 ms-1 (d) 50 ms-1

25. Three identical particles are joined together by a thread as shown in figure. All the three
particles are moving on a smooth horizontal plane about point O. If the speed of the
outermost particle is v0, then the ratio of tensions in the three sections of the string is :
(Assume that the string remains straight)

(a) 3 : 5 : 7 (b) 3 : 4 : 5 (c) 7 : 11 : 6 (d) 6 : 5 : 3

26. Masses of three wires are in the ratio 1 : 3 : 5 and their lengths are in the ratio 5 : 3 : 1. The
ratio of their electrical resistance is
(a)1 : 3 : 5 (b) 5 : 3 : 1 (c) 1 : 15 : 125 (d) 125 : 15 : 1

27. The potential difference between A and B in the following figure is –

(a) 32 V (b) 48 V (c) 24 V (d) 14 V

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 −1
28. A bar magnet has a magnetic moment of 2 .5 JT and is placed in a magnetic field of 0 . 2T .
Work done in turning the magnet from parallel to anti-parallel position relative to field
direction is
(a)0 . 5 J (b) 1 J (c) 2 J (d) 0 J

29. In double slit experiment, the angular width of the fringes is 0.20° for the sodium light ( =
5890 Å). In order to increase the angular width of the fringes by 10%, the necessary
change in the wavelength is
(a) Increase of 589 Å (b) Decrease of 589 Å
(c) Increase of 6479 Å (d) Zero

30. Acceleration a versus time t graph of a body in SHM is given by a

curve shown below. T is the time period. Then corresponding graph
between kinetic energy KE and time t is correctly represented by

(a) (b)

(c) (d)

31. A simple harmonic motion is given by y = 5 (sin 3t + cos 3t). What is the amplitude
of motion if y is in m ?
(a) 100 cm (b) 5 m (c) 200 cm (d) 1000 cm

32. A wave pulse on a string has the dimension shown in figure. The wave speed is v = 1 cm/s.
If point O is a free end. The shape of wave at time t = 3 s is –

(a) (b) (c) (d)

33. A constant volume gas thermometer shows pressure reading of 50cm and 90cm of mercury
at 0°C and 100°C respectively. When the pressure reading is 60 cm of mercury, the
temperature is

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 (a) 25°C (b) 40°C (c) 15°C (d) 12.5°C
34. A plane flying horizontally at a height of 1500 m with a velocity of 200 ms –1 passes
directly overhead an antiaircraft gun. Then the angle with the horizontal at which the gun
should be fired for the shell with a muzzle velocity of 400 m s–1 to hit the plane, is –
(a) 90º (b) 60º (c) 30º (d) 45º

35. Three blocks are suspended as shown in the figure. The

acceleration of the 500 g block is

(a) downwards (b) downwards

(c) downwards (d) upwards

36. Assertion: We walk on smooth surface by short footsteps.
Reason: When we walk on smooth surface by short footsteps normal reaction decrease.
(a) If both Assertion and Reason are True & the Reason is a correct explanation of the
Assertion.
(b) If both Assertion and Reason are True but Reason is not a correct explanation of the
Assertion.
(c) If Assertion is True but the Reason is False.
(d) If both Assertion and Reason are False.

37. An electron of a stationary hydrogen atom passes from the fifth energy level to the ground
level. The velocity that the atom acquired as a result of photon emission will be :

(a) (b) (c) (d)

38. An -particle moves in a circular path of radius 0.83 cm in the presence of a magnetic field
of 0.25 Wb/m2. The de Broglie wavelength associated with the particle will be :
(a) 1 Å (b) 0.1 Å (c) 10 Å (d) 0.01 Å

39. The energy level diagram for an hydrogen‐like atom is shown in the figure. The radius of
its first Bohr orbit is

(a) 0.265 (b) 0.53 (c) 0.132 (d) None of these

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40. In the given circuit the average power developed is–

(a) 50 watt (b) 200 watt (c) 150 watt (d) 200 watt

41. What inductance would be needed to store 1 KWh of energy in a coil carrying a 200A
current
(a) 100 H (b) 180 H (c) 200 H (d) 450 H

42. A rod of length , negligible resistance and mass m slides on two horizontal frictionless
rails of negligible resistance by hanging a block of mass m 1 by the help of insulating mass
less string passing through fixed massless pulley, (as shown). If a constant magnetic field
B acts upward perpendicular to the plane of the figure, find steady state velocity of hanging
mass–

m1 gR m1 gR
2 2 2 2
(a) B ℓ upward (b) B ℓ downward
mgR mgR
2 2 2 2
(c) B ℓ upward (d) B ℓ downward

43. A metallic sphere of mass M falls through glycerine with a terminal velocity v. if we drop
a ball of mass 8M of same metal into a column of glycerine. The terminal velocity of the
ball will be.
(a) 2 v (b) 4 v (c) 8 v (d) 16 v
44. Radius of a capillary is 2 × 10 –3 m. A liquid of weight 6.28 × 10 –4 N may remain in the
tube if surface tension of the liquid will be :
(a) 5 × 10–3 N/m (b) 5 × 10–2 N/m (c) 5 N/m (d) 50 N/m

45. A wheel of mass 2 kg and radius 10 cm is rotating about its axis at an angular velocity of
2 rad/s. The force that must be applied tangentially to the wheel to stop it in 5 revolutions

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 is
(a) 3102 kg-m2/s (b) 4 102 kg-m2/s
(c)  102 kg-m2/s (d) 2 102 kg-m2/s