Multiple choice questions of Chapter 7 of Physics for First Year.

1. One complete round trip of a vibrating body is called
a) Time period
b) Frequency
c) Vibration
d) Amplitude

2. The time required to complete one vibration is called
a) Time period
b) Frequency
c) Time period
d) Velocity

3. The force which opposes the applied force producing the displacement in the spring is called
a) Restoring force
b) Periodic force
c) Centripetal force
d) Resistive force

4. The number of vibrations completed by a body in one second is called
a) Time period
b) Frequency
c) Total vibrations
d) Displacement

5. Simple harmonic motion is a type of:
a) Rotational motion
b) Circular motion
c) Musical arrangement
d) Vibratory motion

6. In SHM, the restoring force is directly proportional to
a) Velocity
b) Acceleration
c) Displacement
d) Time period

7. If f is the frequency of a body executing SHM, its angular frequency 𝜔 is:
a) 4𝜋𝑓
b) 3𝜋𝑓
c) 2𝜋𝑓
d) None of these

8. The distance of vibrating body at any instant from its equilibrium position is called
a) Displacement
b) Frequency
c) Amplitude
d) Time period

9. The product of time period and frequency is:
a) Zero
b) 1
c) 𝜋
d) None of these

10. The phase angle 𝜃 = 𝜔𝑡 of the body performing SHM indicates:
a) Only direction of motion
b) Only magnitude of displacement
c) Both magnitude of displacement and direction of motion
d) None of these

11. In SHM, the velocity of the particle is maximum at:
a) Mean position
b) Extreme position
c) In between mean and extreme position
d) None

12. For a body executing S.H.M, its
a) Momentum remains constant
b) Potential energy remains constant
c) Kinetic energy remains constant
d) Total energy remains constant

13. If the displacement of a body executing S.H.M is plotted against time, then the curve is known
a) Frequency of S.H.M
b) Period of S.H.M
c) Wave form
d) None of them

14. The waveform of simple harmonic motion is:
a) Sine wave
b) Square wave
c) Pulsed wave
d) None of these

15. Frequency of the second pendulum is:
a) 2.5 Hz
b) 0.5 Hz
c) 1.5 Hz
d) 2 Hz

16. The time period of a second pendulum is-
a) 4 seconds
b) 3 seconds
c) 2 seconds
d) 6 seconds

17. The length of second pendulum is.
a) 100 cm
b) 99 cm
c) 99.2 cm
d) 98 cm

18. The restoring force acting on simple pendulum is given by.
a) mgsin θ
b) –mgsinθ
c) mgcos θ
d) –mgcosθ

19. Which expression is correct for the time period of a simple pendulum:
a) 𝑇 ∝ 𝐿
b) 𝑇 ∝ 𝑚
c) 𝑇 ∝ 𝐿
d) 𝑇 ∝ 𝑚

20. An object undergoes S.H.M has maximum speed when its displacement from the mean position is
a) Maximum speed
b) Zero
c) Half of the maximum value
d) One third of the maximum value

21. An object undergoes S.H.M has maximum acceleration when its displacement form the mean position is
a) Maximum
b) Zero
c) Half of the maximum value
d) One third of the maximum value

22. In simple harmonic motion:
a) P.E remains constant
b) K.E remain constant
c) Total energy remain constant
d) Total momentum remain constant

23. The motion of simple pendulum is SHM only if:
a) Amplitude is large
b) Mass is small
c) Amplitude is small
d) Length is small

24. In S.H.M, the velocity of a particle is maximum at:
a) Mean position
b) Extreme position
c) Middle between mean and extreme position on the right side
d) Middle between mean and extreme position on the left side

25. The angle 𝜃 = 𝜔𝑡 which specifies the displacement as well as direction of motion of the point executing SHM is known as:
a) Critical angle
b) Phase angle
c) Plane angle
d) Solid angle

26. Phase of SHM describes.
a) Displacement only
b) Direction of motion only
c) Both displacement and direction of motion
d) Neither displacement nor direction of motion

27. Natural frequency of simple pendulum depends upon:
a) Its mass
b) Its length
c) Square of its length
d) Square root of its length

28. The process in which energy is dissipated in oscillating system is called:
a) Resonance
b) Damping
c) Forced oscillation
d) None of these

29. In damped harmonic oscillation, which one deceases?
a) Amplitude of vibration
b) Energy of vibration
c) Both amplitude and energy
d) Neither amplitude nor energy

30. A physical system undergoing forced vibrations is known as
a) Driven harmonic oscillator
b) Resonance
c) Simple harmonic oscillator
d) None of above

31. When 𝜃 is small, sin𝜃 is approximately equal to
a) 2𝜃
b) Zero
c) 𝜃
d) 𝜃 2

32. At mean position, during SHM:
a) P.E is maximum and K.E is minimum
b) P.E is minimum and K.E is maximum
c) Both K.E and P.E are maximum
d) Both K.E and P.E are minimum

33. When the bob of simple pendulum is at extreme position, it has
a) K.E
b) P.E
c) Both P.E and K.E
d) None

34. Tuning of radio set is an example of
a) Mechanical resonance
b) Musical resonance
c) Electrical resonance
d) Free vibration

35. The frequency of waves produced in microwaves oven is:
a) 1435 MHz
b) 2450 MHz
c) 1860 MHz
d) 2850 MHz

36. Sharpness of resonance is.
a) Directly proportional to damping force
b) Inversely proportional to damping force
c) Equal to square of damping force
d) None of these

37. Which one does not work according to resonance?
a) T.V
c) Microwave oven
d) Bulb

38. The oscillations in which amplitude decreased steadily with time are called:
a) Natural oscillations
b) Free oscillation
c) Damped oscillations
d) Forced oscillations

39. Distance covered during one vibration of an oscillating body in term of amplitude A is:
a) 𝐴 2
b) 𝐴
c) 2𝐴
d) 4𝐴