ECAT Pre Computer Science Chapter 8 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 8 Waves

Try The MCQ's Test For ECAT Physics Chapter 8 Waves

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ECAT Physics Chapter 8 Waves

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Question # 1

The frequency of free vibrations is known as

Question # 2

Which one is not produced by sound waves in air?

Question # 3

When a body is pulled away from its rest or equilibrium position and then released, the body oscillates due to

Question # 4

Resonance occurs when one of the natural frequencies of vibration of the forced or driven harmonic oscillator

Question # 5

If one end of a rubber cord is fixed with a support and the other end is wiggled by hand, the waves generated on the card are:

Question # 6

In case of mechanical waves, we study the motion of

Question # 7

Sound waves in air always

Question # 8

In solids, only following type/s of wave can travel:

Question # 9

A stationary sound wave has frequency 165 Hz (speed of sound in air = 330 m/s) then distance between two consecutive nodes is

Question # 10

Energy is dissipated and consequently the energy mass system do not oscillate indefinitely because of

Question # 11

Smaller the damping, the resonance will be

Question # 12

The speed of sound in a medium depends on

Question # 13

The velocity of sound is greatest in

Question # 14

An object undergoes S.H.M has maximum acceleration when its displacement form the means position

Question # 15

As the bob of the pendulum moves to and fro which of the force is experienced by the bob

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 Angular frequency 'w' is basically a characteristics of
A. linear motion
B. circular motion
C. both of them
D. none of them
2 The waves produced in a microwave oven have wavelength.
A. 12 mm
B. 12 cm
C. 12 m
D. 12 mm
3 Resonance occurs when one of the natural frequencies of vibration of the forced or driven harmonic oscillator
A. greater than the frequency of applied force
B. equal to the frequency of applied force
C. less than the frequency of applied force
D. all of them
4 When two waves with same frequency and constant phase difference phase difference interfere
A. There is a gain of energy
B. There is a loss of energy
C. The energy is redistributed and the distribution changes with time
D. The energy is redistributed and the distribution remains constant with time
5 To hear a clear echo, the reflecting surface must be at a minimum distance of
A. 10 m
B. 16.5 m
C. 33 m
D. 66 m
6 The weight 'mg' of the bob is resolved into
A. one component
B. two components
C. three components
D. four components
7 The bob of a simple pendulum is suspended by
A. string
B. heavy inextensible string
C. light extensible string
D. light inextensible string
8 Acceleration of the mass at any instant is given by
A. a=k/m x
B. a= - m/k x
C. a = - k/m x
D. a=m/k x
9 An object undergoes S.H.M has maximum speed when its displacement from the mean position is
A. maximum
B. zero
C. half of the maximum value
D. one third of the maximum value
10 Decibel is unit of
A. Intensity of light
B. x-ray radiation capacity
C. sound loudness
D. Energy of radiation

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