Physic Quiz Part 2

1. The displacement x (in meter) varies with time t (in second) as x = (t – 2)^2. The distance covered by the particle in first 4 seconds is:

2. A ball is projected upwards from the top of a tower with a velocity 50 m/s making an angle of 30° with the horizontal. If the height of the tower is 70 m, the time taken by the ball to hit the ground is:

3. A train 150 m long crosses a platform 1500 m long in 90 seconds. The speed of the train is:

4. A block moves down a smooth inclined plane of inclination θ and velocity on reaching the ground is v. Had the plane been rough, velocity at bottom would have been v/n, the coefficient of friction for the rough plane is:

5. A particle moves in a circle of radius 30cm with a constant speed of 6m/s. Its acceleration is:

6. The distance of two planets from the sun are 10^13 and 10^12m respectively. The ratio of the time periods of these planets will be:

7. A thin circular ring of mass M and radius r is rotating about its axis with angular velocity ω. Two objects of each mass m are attached gently to the opposite ends of a diameter of the ring. The ring will now rotate with an angular velocity of:

8. A ball of mass 5 kg hangs from a spring and oscillates with a time period of 2π seconds. If the ball is removed, the spring shortens by:

9. The upper end of a wire, 1 m long and 4 mm radius, is clamped. The lower end is twisted by an angle of 30°. The angle of shear is:

10. Two rods of different materials having coefficients of thermal expansion α1, α2 and Young’s moduli Y1, Y2 are fixed between two rigid walls. The rods are heated such that they undergo the same increase in temperature. There is no bending of the rods. If α1:α2 = 2:3, the thermal stresses developed in the two rods will be equal provided Y1:Y2 is:

11. 1 cal/gm/°C is equal to:

12. A 300 m deep lake is located on a newly discovered planet. The atmospheric pressure on the surface of the lake is 5.3 × 10⁵ Nm⁻². The density of the liquid in the lake is 110 kg/m³. The pressure at the bottom of the lake is:

13. The coefficient of viscosity of a liquid is dimensionally represented by:

14. A sound absorber attenuates the sound level by 20 dB. The intensity decreases by a factor of:

15. A steel wire of length L, cross-sectional area A and Young’s modulus Y behaves as a spring of spring constant k where k is:

Physics Quiz

1. The displacement x (in meter) varies with time t (in second) as x = (t – 2)^2. The distance covered by the particle in first 4 seconds is:

2. A ball is projected upwards from the top of a tower with a velocity 50 m/s making an angle of 30° with the horizontal. If the height of the tower is 70 m, the time taken by the ball to hit the ground is:

3. A train 150 m long crosses a platform 1500 m long in 90 seconds. The speed of the train is:

4. A block moves down a smooth inclined plane of inclination θ and velocity on reaching the ground is v. Had the plane been rough, velocity at bottom would have been v/n, the coefficient of friction for the rough plane is:

5. A particle moves in a circle of radius 30cm with a constant speed of 6m/s. Its acceleration is:

6. The distance of two planets from the sun are 10^13 and 10^12m respectively. The ratio of the time periods of these planets will be:

7. A thin circular ring of mass M and radius r is rotating about its axis with angular velocity ω. Two objects of each mass m are attached gently to the opposite ends of a diameter of the ring. The ring will now rotate with an angular velocity of:

8. A ball of mass 5 kg hangs from a spring and oscillates with a time period of 2π seconds. If the ball is removed, the spring shortens by:

9. The upper end of a wire, 1 m long and 4 mm radius, is clamped. The lower end is twisted by an angle of 30°. The angle of shear is:

11. 1 cal/gm/°C is equal to:

12. A 300 m deep lake is located on a newly discovered planet. The atmospheric pressure on the surface of the lake is 5.3 × 10⁵ Nm⁻². The density of the liquid in the lake is 110 kg/m³. The pressure at the bottom of the lake is:

13. The coefficient of viscosity of a liquid is dimensionally represented by:

14. A sound absorber attenuates the sound level by 20 dB. The intensity decreases by a factor of:

15. A steel wire of length L, cross-sectional area A and Young’s modulus Y behaves as a spring of spring constant k where k is:

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