NEET WEEKLY TEST PHYSICS 5 (15.08.2026)

1. The particle of mass 5kg is attached to the circular disc of radius 2 cm and negligible mass. Find the moment of inertia about axis passing through the centre perpendicular to the plane.

2. A solid body of volume V floats with 1/4th of its total volume exposed above the surface of liquid A. When the same body is placed in liquid B, it floats with 2/5 th of its total volume submerged inside the liquid. The ratio of the density of liquid A to the density of liquid B is

3. The moment of inertia of uniform circular disc of mass M and radius R about an axis normal to the disc touching at its surface will be.

1. MR²
2. 1/2 MR²
3. 3/2 MR²
4. 5/4 MR²

4. Water flows steadily through a horizontal pipe of non-uniform cross-section. At a point A where the diameter of the pipe is 4 cm, the velocity of flow is 2m\/s. At another point B downstream, the pipe branches into two smaller circular pipes C and D. The diameter of pipe C is 2 cm, and the speed of water through it is 3m/s . If diameter of pipe D is 1 cm, the speed of water through it will be

1. 20 m/s
2. 10 m/s
3. 16 m/s
4. 12 m/s

5. The moment of inertia of circular disc is maximum about an axis perpendicular to the disc and passing through


1. A
2. B
3. C
4. D

6. A U-tube of uniform cross-section with a tube diameter of 4 mm contains water and methylated spirit separated by mercury. The mercury columns in the two arms are at the same level with 10 cm of water in one arm and 12.5 cm of spirit in the other. Calculate the mass of the methylated spirit present in the tube.

1. 5.24 g
2. 3.21 g
3. 1.26 g
4. 6.0 g

7. The ratio of the radii of gyration of a circular disc to that of a circular ring, each of same mass and radius, around their respective axes is

1. 1/√2
2. √2/1
3. 1/2
4.  2/1

8. The cylindrical tube of a spray pump has a cross-section of 8.0 cm² one end of which has 40 fine holes each of diameter 1.0 mm. If the liquid flow inside the tube is 1.2 m/min, what is the approximate speed of ejection of the liquid through the holes?

1. 50 m/min
2. 30 m/min
3. 40 m/min
4. 20 m/min

9. The moment of inertia of a body about a given axis of rotation depends upon

1. The distribution of mass
2. Distance of particle of body from the axis of rotation
3. Shape of the body
4. All of the above

10. A rigid body is rotating about its axis. To stop the rotation, we have applied:

1. Pressure
2. Force
3. Momentum
4. Torque

11. The equation of continuity is based on the principle of conservation of

1. Energy
2. Momentum
3. Mass
4. None

12. A wheel of moment of inertia 2.5 kgm² has an initial angular velocity of 40 rads^-1. A constant torque of 10Nm acts on wheel. The time during which the wheel is accelerated to 60 rads^-1 is

1. 4.5 s
2. 6 s
3. 5 s
4. 2.5 s

13. A cubical block of length 100 cm is partially immersed in a liquid of density 400 kg m^-3. If the apparent weight loss of the block is 1400 N, then the percentage of volume of the block outside the liquid surface will be g=10 ms^-2

1. 50
2. 70
3. 65
4. 35

14. A grindstone has a moment of inertia of 6 kgm². A constant torque is applied and the grindstone is found to have a speed of 150 rpm, 10 seconds after starting from rest. The torque is

1. 3 π Nm
2. 3 Nm
3.  ^π ⁄ 3  Nm
4. 4 π Nm

15. The minimum value absolute pressure needed by a submarine to withstand the depth of the Mariana Trench (11 km deep) is (density of water is 1000 kg m^-3, g=10 ms^-2, 1 atm =10⁵ Pa )

1. 1011 atm
2. 1101 atm
3. 1000 atm
4. 1001 atm

16. Moment of inertia (M.I.) of four bodies, having same mass and radius, are reported as, I₁= MI of thin circular ring about its diameter, I₂= MI of disc about axis perpendicular to disc passing through centre, I₃= MI of solid cylinder about axis and I₄= MI of solid sphere about diameter. Then

1. I₁=I₂=I₃<I₄
2. I₁ + I₂=I₃ + 5/2I₄
3. I₁+I₃<I₂+I₄
4. I₁=I₂=I₃>I₄

17. Consider the following statements:
1. The charge on an alpha particle is 3.2×10^-19 C
2. The charge on neutron is zero.
3. Like charges attracts and unlike charges repels each other.
4. Electrostatic force F is attractive is F<0.
Choose the correct option:

1. A and B only
2. A, B and C only
3. A, B, C and D
4. A, B and D only

18. What height of mercury will be required to equalize 2 atm of pressure? Given 1 atm =10⁵  Pa and density of mercury be 13600 kg m^-3.

1. 15 m
2. 1.5 m
3. 150 m
4. 15 cm

19. The electrostatic potential due to an alpha particle at a distance 6 Å is:

1. 14.4Volt
2. 9 Volt
3. 18 Volt
4. 28.8 Volt

20. A cylindrical tank, 10 m deep and 2 m in diameter, contains water to a depth of 1 m. Determine the power required to pump out all the water in 1 second.

1. 85π kW
2. 64π kW
3. 95π kW
4. 20π kW

21. What is the electrostatic force between one proton and one electron placed at a distance 16 mm apart? What is the nature of the force?

1. 9×10^-25 N; Repulsive
2. 9×10^-25 N; Attractive
3. 1.44×10^-24 N; Repulsive
4. 1.44×10^-24  N; Attractive

22. A particle of mass 2 kg moves along the x-axis under a force F(x)=6x²+αx.
It starts from rest at x=0 and reaches x=5mwith a speed of 10m/s.  Determine the value of α.

1. -1.33 N/m
2. -12 N/m
3. 4 N/m
4. 0.75 N/m

23. The Coulomb force of repulsion between two alpha particles separated by a distance 4 fermi is:

1. 57.6 N
2. 23.04 N
3. 921.6 N
4. 14.4 N

24. A body of mass 5 kg moves in a straight line with displacement x(t)=(3t²+ 4t -2) m where all constants are expressed in S.I units. Find the work done by the net force during t=0 s  to t=1 s .

1. 290 J
2. 280 J
3. 210 J
4. 220 J

25. The total electrostatic potential energy of the system of one proton and one electron separated by a distance 0.5 Å is: [1 eV=1.6×10^-19)  J]

1. -4.614 eV
2. -28.8 eV
3. -1.44 eV
4. -13.6 eV

26. A body of mass 1 g is projected vertically upward with an initial speed of 1 m/s. It rises to a maximum height of 0.01 cm. Assuming the resistive force due to air is constant throughout the motion, determine its magnitude.

1. 6.5 N
2. 5 N
3. 5.5 n
4. 9.78 N

27. Calculate the electrostatic force of attraction between an electron and a proton in H-atom. The radius of electron orbit is 0.53 Å. What is the nature of the force?

1. 8.2×10^-8 N; Repulsive    
2. 8.2×10^-10  N; Repulsive
3. 8.2×10^-8 N; Attractive
4. 8.2×10^-10  N: Attractive

28. A particle of mass 𝑚 starts moving from the origin along the x –axis, and its velocity varies with position (𝑥) as 𝑣 = 𝑘√x, the power developed during the first 𝑡 seconds is

29. The variation of electrostatic potential (V) with distance (r) for a point charge is best represented by

30. Choose the incorrect option from the following:

1. Coulomb force is a central force
2. Coulomb force obeys inverse square law
3. Coulomb force depends upon the medium
4. Coulomb force is non-conservative force

31. A body of mass 10 kg travels in a straight line with velocity v=βx³where, β=5m 1) s^-1). The average resistive net force during the displacement from x=0 to x=1 m  is

1. 12.5 N
2. 25 N            
3. 5 N
4. 125 N

32. The electrostatic potential energy between one alpha particle and one proton separated by a distance 10 cm apart is:

1. 4.6×10^-27 J
2. 23×10^-27 J
3. 4.6×10^-28 J
4. 23×10^-26 J

33. A body constrained to move in the x- direction, is subjected to a force given by The work done by this force in moving the body from the origin to (1, 0, 0) is

1. 2 J
2. 20 J
3. 5 J
4. 10 J

34. The potential energy between two atoms is given by Ux = ax²-b where a>0 and b>0, and 𝑥 is the distance between the atoms. The atom is in stable equilibrium, when

1. x=b/a
2. x=0
3. x=a/b
4. x=a-b

35. A uniform chain of length l and mass M lies on a smooth table. Onesixth of its length hangs over the edge. The work required to pull the chain completely onto the table is

1. Mgl/36
2.  Mgl/72
3. Mgl/18
4.  Mgl/8

36. Statement A: If the value of relative density of a liquid is less than 1, the liquid floats
       Statement B: Laminar flow can occur only in 3 directions
      Statement C: According to Pascal’s law, force is amplified when pressure is applied from the larger piston to the smaller piston
Which of these statements is/are true?

1. A and B
2. C only
3. A only
4. A and C

37. Which of the following statements is incorrect?

1. Path length is a scalar quantity whereas displacement is a vector quantity.
2. The magnitude of displacement is always equal to the path length traversed by an object over a given time interval.
3. The displacement depends only on the end points whereas path length depends on the actual path followed.
4. The path length is always positive whereas displacement can be positive, negative and zero.

38. The numerical ratio of distance to displacement is 

1. Always equal to one
2. Always less than one
3. Always greater than one
4. Equal or more than one

39. If a man goes 10 m toward north and 20 m toward east, then his displacement is approximately equal to

1. 22.5 m
2. 32 m
3. 29 m
4. 30 m

40. A car is moving along a straight line OP as shown in the figure. It moves from O to P in 18 sand returns from P to Q in 6 s. Which of the following statements is not correct regarding the motion of the car? 

1. The average speed of the car in going from O to P and come back to Q is 20 ms^-1
2. The average velocity of the car in going from O to P and come back to O is 0 ms^-1
3. The average speed of the car in going from O to P is 20 ms^-1
4. The average velocity of the car in going from O to P and come back to Q is 20 ms^-1

41. A cyclist moving on a circular track of radius 40m completes half a revolution in 40s. Its average velocity is

1. Zero
2. 4π ms^-1
3. 2 ms^-1
4. 8π ms^-1

42. A body moves in a straight line. It covers one-third of the total distance with speed v₁ and the remaining two-thirds of the distance with speed v₂. The average speed of the body for the entire journey is:

43. A car travels the first half of the total distance between two places with a speed of 40 km h⁻¹ and the second half with a speed of 60 km h⁻¹. Calculate the average speed for the entire journey.

1. 48 km/h
2. 30 km/h
3. 26.67 km/h
4. 50 km/h

44. A particle moves along a circular path of radius R. If it covers one-fourth of the circle, what is the ratio of the magnitude of its displacement to the distance traveled?

1. (2√2)/π
2. √2/π
3. π/(2√2)
4. 1/√2

45. Observe the given distance-time graph.

Identify the respective speeds of the body when it moves from O to A and from B to C.

1. 3 km h⁻¹, 5 km h⁻¹
2. 1 km h⁻¹, 3 km h⁻¹
3. 2 km h⁻¹, 4 km h⁻¹
4. 4 km h⁻¹, 2 km h⁻¹