NEET 05 1ST WEEKLY TEST PHYSICS (12.05.2025)

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Welcome to your NEET 05 1ST WEEKLY TEST PHYSICS (12.05.2025)

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IMPORTANT INSTRUCTIONS

1. The test is of 90 minutes duration and Test Booklet contains 45 questions. Each question carried 4 marks for each correct response, the candidate will get 4 marks.
2. Use of Cell phone/Electronics gadgets/Calculator etc. are not allowed.

PHYSICS

1. The SI unit of measuring angles in 3-D steradian is a

a) derived unit
b) fundamental unit
c) supplementary quantity
d) supplementary unitDeselect Answer

a)

b)

c)

d)

None

2. The amount of matter/substance is a

a) fundamental unit
b) fundamental quantity
c) derived unit
d) derived quantityDeselect Answer

a)

b)

c)

d)

None

3. The number of significant figures in 000005610 ×10⁶ is

a) 3
b) 2. 4
c) 10
d) 9Deselect Answer

a)

b)

c)

d)

None

4. If radius of a sphere is 5.6 cm, the volume with regards to significant figures in cm³ is

a) 734
b) 735
c) 730
d) 740Deselect Answer

a)

b)

c)

d)

None

5. If Current=(5±0.2)A and Voltage=(6±0.9)Ω, the absolute error in measuring Resistance is

a) 0.24
b) 0.23
c) 0.42
d) 0.32Deselect Answer

a)

b)

c)

d)

None

6. If the percentage errors in measuring the quantities a, b, c and d be 0.5%, 0.05%, 0.6% and 0.8% respectively, the percentage error in Y in the relation

a) 6.41%
b) 7.41%
c) 5.4%
d) 5.5%

Deselect Answer

a)

b)

c)

d)

None

7. The dimensional formula for absolute permittivity of free space ε₀ is

a) [M¹ L^-3T⁴ A²]
b) [M^-1 L^-3 T⁴ A²]
c) [M^-1 L³ T⁴ A²]
d) [M¹ L³ T⁴ A²]

Deselect Answer

a)

b)

c)

d)

None

8. Dimensional formula for electrical inductance (L) is

a) [ML² T^-2 A^-2]
b) [ML² T^-2 A²]
c) [ML² T² A^-2 ]
d) [ML² T² A²]

Deselect Answer

a)

b)

c)

d)

None

9. Before measurement when the two jaws of a vernier calliper are brought in contact, it is found that the zero of the vernier scale lies to the left of the zero of the main scale, and that the 7^th vernier scale division coincides with the main scale division. While measuring the thickness (side) of a cube, the linear scale reads 5 cm and that the 5^th vernier scale coincides with the main scale. The volume of the cube (in cm³) in an appropriate number of significant figures is (given least count of the calliper is 0.1 cm)

a) 238
b) 240
c) 230
d) 250

Deselect Answer

a)

b)

c)

d)

None

10. There exists a positive error in a screw gauge where its 36^th division of circular scale coincides with the reference line. When a sphere is clamped between the jaws, it is found that the linear scale reads 4 cm, and that the 68^th division coincides with the reference line. The screw moves a distance of 5 cm after 5 full rotations of the circular scale. If there are 100 divisions on the circular scale, the radius of the sphere is

a) 4.32 cm
b) 4.40 cm
c) 2.16 cm
d) 2.20 cm

Deselect Answer

a)

b)

c)

d)

None

11. If the least counts of micrometres M₁, M₂ M₃ and M₄are

respectively, then the correct order of the micrometres from least to most accurate is

a) M₄<M₃<M₂<M₁b)M₁<M₂<M₃<M₄
c) M₁<M₂<M₄<M₂
d) M₄<M₃<M₁<M₂

Deselect Answer

a)

b)

c)

d)

None

12. Two blocks each of mass m are placed on a smooth horizontal surface. They attract each other with a force F=k/r², where r is the separation between them. Calculate work required to increase the separation between the blocks slowly from 1 m to 2 m

a) k/2
b) 7k/4
c) 7klog4
d) 4klog7

Deselect Answer

a)

b)

c)

d)

None

13. A ball of mass 2kg strikes a wall of infinite mass with velocity 10 m/s and bounds back with 5 m/s. Work done by the ball is

a) 25 J
b) 2. 50 J
c) 75 J
d) 100 J

Deselect Answer

a)

b)

c)

d)

None

14. A train is moving with a velocity of 30 km/h has kinetic energy of 52,00 J. When the velocity of the train is increased to 60 km/h, the work done is;

a) 0
b) 1,56,000
c) 1,04,000 J
d) 52,000J

Deselect Answer

a)

b)

c)

d)

None

15. If kinetic energy of a 2 kg mass object has been changed by 3 kJ by a 1000 N force acting along the line of motion on a smooth surface, then displacement made by the object is

a) 2 m
b) 3 m
c) 1 m
d) 4 m

Deselect Answer

a)

b)

c)

d)

None

16. A particle of mass 10 kg moves with a velocity a∛x in SI unit, where x is displacement. The work done by the net force during the displacement of the particle from x = 1 m to x = 2 m is

a) 35a J
b) 25a J
c) 35a² J
d) 25a²J

Deselect Answer

a)

b)

c)

d)

None

17. A ball of mass m is dropped from a height h on a platform fixed at the top of a vertical spring, as shown in figure. The platform is depressed by a distance x. Then the spring constant is

Deselect Answer

a)

b)

c)

d)

None

18. A particle of mass 10 kg is moving in a straight line. If its displacement, x with time tis given by x=(t³−2t−10) m then the force acting on it at the end of 4 seconds is

a) 240 N
b) 2400 N
c) 300 N
d) 1200 N

Deselect Answer

a)

b)

c)

d)

None

19. A block of mass 10 kg is forced to slide on a smooth surface by a force of 19.6 N as shown in figure. How much additional energy has to be applied on the block just to stop at point B? Ignore any other resistance, take g = 10 N/kg .

a) 1000 J
b) 0 J
c) 98 J
d) 196 J

Deselect Answer

a)

b)

c)

d)

None

20. A force F_x acts on a particle such that its position x changes as shown in the figure. The work done by the particle as it moves from x = 0 to 20 m is

a) 37.5 J
b) 10 J
c) 15 J
d) 45 J

Deselect Answer

a)

b)

c)

d)

None

21. The potential energy of a particle in a force field is

where A and B are positive constants and r is the distance of particle from the centre of the field. For stable equilibrium, the distance of the particle is

a) B/2A
b) 2A/B
c) A/B
d) none of these

Deselect Answer

a)

b)

c)

d)

None

22. A spring expenses 10 J of energy for an extension of 10 mm. How much energy is required to extend another 10 mm?

a) 10 J
b) 20 J
c) 30 J
d) 40 J

Deselect Answer

a)

b)

c)

d)

None

23. The centre of mass of two particles with masses 2kg and 6kg located at (1, 1, 1), (2, 2, 1) respectively has the coordinates

Deselect Answer

a)

b)

c)

d)

None

24. In a molecule of sodium chloride, the masses of sodium and chlorine atoms are in the ratio 23: 36. If the separation between the two atoms is d, distance of centre of mass of the molecule from sodium atom

Deselect Answer

a)

b)

c)

d)

None

25. Two skaters A and B weighing 40 kg and 60 kg respectively stand facing each other 5 m apart. If they pull a light rope stretched between them, then they meet

a) 1 m from A
b) 2 m from A
c) 3 m from A
d) 4 m from A

Deselect Answer

a)

b)

c)

d)

None

26. Masses each 1 kg are placed at the vertices of an isosceles triangle ABC in which AC = BC = 5cm and AB = 8 cm. The distance of centre of mass of the system from the vertex C is

a) 1 cm
b) 2 cm
c) 3 cm
d) 4 cm

Deselect Answer

a)

b)

c)

d)

None

27. Two particles of masses 2 m and 3 m are at a distance d apart. Under their mutual gravitational force, they start moving towards each other. The acceleration of their centre of mass when they are d/2 apart is

Deselect Answer

a)

b)

c)

d)

None

28. Three identical particles each of same mass are placed touching each other with their centres on a straight line. Their centres are at A, B and C respectively. Then distance of centre of mass of the system from A

Deselect Answer

a)

b)

c)

d)

None

29. Particles of masses 1gm, 2gm, 3gm and 4 gm are placed at x=1cm x=2cm, x=3cm, x=4cm respectively. Then Xcm=

a) 1 cm
b) 2 cm
c) 3 cm
d) 4 cm

Deselect Answer

a)

b)

c)

d)

None

30. Four particles, each of mass 1kg, are placed at the corners of a square of side one meter in the X – Y plane. If the point of intersection of the diagonals of the square is taken as the origin, the coordinates of the centre of mass are

a) (1,1)
b) (-1,1)
c) (1,-1)
d) (0,0)

Deselect Answer

a)

b)

c)

d)

None

31. Two identical particles move towards each other with velocity 2V and V respectively. The velocity of centre of mass is

a) V
b) V/3
c) V/2
d) Zero

Deselect Answer

a)

b)

c)

d)

None

32. Assertion: Center of mass and centre of gravity of a body will coincide on moon.
Reason: There is no gravity on moon.

a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
b) If both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.
c) If Assertion is true but Reason is false.
d) If Assertion is false but Reason is true.

Deselect Answer

a)

b)

c)

d)

None

33. The position of centre of mass of a system of particles does not depend upon

a) masses of particles
b) forces on particles
c) position of the particles
d) relative distance between the particles

Deselect Answer

a)

b)

c)

d)

None

34. A certain metal emitted photoelectrons with a yellow light but not with orange light. If this surface is illuminated with Indigo light, then

a) Photoelectric will occur
b) Photoelectric effect will not occur
c) Photocurrent increases
d) Incomplete data

Deselect Answer

a)

b)

c)

d)

None

35. A certain metal has a work function ϕ. If it is illuminated with an incident radiation of energy E=hν. What will happen to the work function if the incident radiation is doubled.

a) Increases 2 times
b) Decreases 2 times
c) Increases 4 times
d) Remains the same

Deselect Answer

a)

b)

c)

d)

None

36. What is the de Broglie wavelength of a bullet of mass 040 kg travelling at the speed of 1 km s^-1).

a) 7×10^-35 m
b) 1.1×10^-32 m
c) 3.3×10^-23 m
d) 2.65×10^-33 m

Deselect Answer

a)

b)

c)

d)

None

37. Light of frequency 7.21× 10¹⁴ Hz is incident on a metal surface. Electrons with a maximum speed of 6.0×10⁵ m s^-1 are ejected from the surface. What is the threshold frequency photoemission of electrons?

a) 1. 4.7×10¹⁴ Hz
b) 1.1×10¹⁴ Hz
c) 7.0×10¹⁴ Hz
d) Data insufficient

Deselect Answer

a)

b)

c)

d)

None

38. Monochromatic light of wavelength 6328 Å is produced by a helium-neon laser. The momentum of each photon in the light beam is

a) 05×10^-25 kg m s^-1
b) 05×10^-29 kg m s^-1
c) 05×10^-27kg m s^-1
d) 05×10^-31 kg m s^-1

Deselect Answer

a)

b)

c)

d)

None

39. The wavelength associated with 1 MeV proton is (mass of proton 10^-27 kg)

a) 28.6×10^-12 m
b) 2.86×10^-12 m
c) 28.6×10^-15 m
d) 2.86×10^-15 m

Deselect Answer

a)

b)

c)

d)

None

40. The wavelength λ_p of a Photon and λ_e of an electron of same energy are related by

Deselect Answer

a)

b)

c)

d)

None

41. According to Einstein’s photoelectric equation the graph between the kinetic energy of photoelectrons ejected and the frequency of the incident radiation is

A. (a)
B. (b)
C. (c)
D. (d)

Deselect Answer

a)

b)

c)

d)

None

42. In a photocell, the curve for current (I) verse potential difference (V) is best represented by

A. (b)
B. (a)
C. (d)
D. (c)

Deselect Answer

a)

b)

c)

d)

None

43. The momentum of a photon of energy will be

Deselect Answer

a)

b)

c)

d)

None

44. The kinetic energy of an electron gets tripled, then the de-Broglie wavelength associated with it changes by a factor

Deselect Answer

a)

b)

c)

d)

None

45. In the given graph, let I_a, I_b and I_c be intensities and f_a, f_b and f_c be the frequencies for the curves a, b and c respectively The, which of the following is correct

a) f_b=f_cand I_b=I_c
b) f_a=f_b and I_b=I_c
c) f_a=f_c and I_b=I_c
d) f_a=f_b and I_a=I_c

Deselect Answer

a)

b)

c)

d)

None

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