1. The period of thin magnet is 4 sec. if it is divided into two equal halves then the time period of each part will be

2. The bob of a simple pendulum is a spherical hollow ball filled with water. A plugged hall near the bottom of the oscillating bob gets suddenly unplugged. During observation, till water is coming out, the time -period of the oscillation would

3. The amplitudes of two similar pendulums are 2 cm and 5 cm. The ratio of their energies is

4. A particle is acted simultaneously by mutually perpendicular simple harmonic motions x = a cos ωt and y = a sin ωt. The trajectory of motion of the particle will be

5. If the length of seconds pendulum is increased by 2%, how may seconds it will lose per day?

6. Which of the following is not essential for S.H.M.?

7. The displacement of a particle is represented by the equation y = sin³ ωt. The motion is

8. In S.H.M, the vibration of which of the following is not a sine curve?

9. The period of a simple harmonic oscillator is 2 sec. The ratio of its maximum velocity and maximum acceleration is

10. If a simple harmonic oscillator has got a displacement of 0.02 m and acceleration equal to 2.0 ms^-2 at any time, the angular frequency of the oscillator is equal to

11. The equation of motion of a particle is x = a cos (αt)². The motion is

12.  The displacement of a particle is represented by the equation y = 3 cos(π/4 – 2ωt). The motion of the particle is

13. Length of a simple pendulum executing simple harmonic motion is increased by 21%. The percentage increase in the time – period of the pendulum of increased length is

14. The restoring force acting on the particle executing S.H.M. is

15. In SHM, graph of which of the following is a straight line?

16. Damping in oscillatory motion is caused by

17.  A particle executing SHM has a maximum speed of 30 cm/s and a maximum acceleration of 60 cm/s². The period of oscillation is

18. The displacement of a particle varies with time according to the relation y = a sin ωt + b cos ωt

19. If a hole is bored along the diameter of the earth and a stone is dropped into the hole

20. The maximum velocity for particle in SHM is 0.16 m/s and maximum acceleration is 0.64 m/s². The amplitude is