ECAT Pre General Science Physics Chapter 8 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 8 Waves

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ECAT Pre General Science Physics Chapter 8 Waves

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Question # 1

In a resonance situation the amplitude of the motion may become extra ordinarily large, if

Question # 2

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

Question # 3

The temperature at which the speed of sound becomes double as was at 27°C is

Question # 4

SI unit of frequency is

Question # 5

The time period of pendulums of different lengths would be

Question # 6

The frequency of free vibrations is known as

Question # 7

The distance covered by the wave during one period is called its:

Question # 8

For transmission of both transverse and longitudinal waves, we can use:

Question # 9

If two waves of length 50 cm and 51 cm produced 12 beats per second, the velocity of sound is

Question # 10

A string is stretched between two points and is plucked at right angles to its length, the vibration produced is:

Question # 11

The waves which propagate out in the space due to oscillations of electric and magnetic fields are called:

Question # 12

The vibratory or oscillatory motion of a body is

Question # 13

In case of mechanical waves, we study the motion of

Question # 14

Which one is not produced by sound waves in air?

Question # 15

Decibel is unit of

Question # 16

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

Question # 17

To hear a clear echo, the reflecting surface must be at a minimum distance of

Question # 18

For production of beats the two sources must have

Question # 19

What is frequency of radio waves transmitted by a station, if the wavelength of those waves is 300 m?

Question # 20

The waves in which the particles of the medium are displaced in a direction perpendicular to the direction of propagation of waves are known as

Question # 21

It is possible to recognize a person by hearing his voice even if he is hidden behind a solid wall. This is due to the fact that his voice

Question # 22

In the formula for finding the speed of waves in the spring, unit of m in SIn units is:

Question # 23

Example of vibratory motion is

Question # 24

Example of progressive wave is

Question # 25

Waves transport energy

Question # 26

Time period of simple pendulum is independent of

Question # 27

The characteristic of a body executing S.H.M is that its acceleration is

Question # 28

When two progressive waves of nearly same frequencies superimpose and give rise to beats, then

Question # 29

Smaller the damping, the resonance will be

Question # 30

It two waves of amplitude 'a' produce a resultant wave of amplitude a, then the phase difference between them will be

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 In solids, only following type/s of wave can travel:
A. Transverse
B. Longitudinal
C. Both A and B
D. None of them
2 Smaller the damping, the resonance will be
A. more flat
B. more sharp
C. both of them
D. none of them
3 An object undergoes S.H.M has maximum acceleration when its displacement form the means position
A. maximum
B. zero
C. half of the maximum value
D. one third of the maximum value
4 The portion of the water above its mean level forms a:
A. Crest
B. Trough
C. Both A and B
D. None of these
5 The expression for restoring force is
A. F=ma
B. F=kx
C. F= -kx
D. Kx=ma
6 The speed of sound in a medium depends on
A. The elastic property but not on the inertia property
B. The inertia property but not on the elastic property
C. The elastic property as well as the inertia property
D. Neither the elastic property nor the inertia property
7 When a body is pulled away from its rest or equilibrium position and then released, the body oscillates due to
A. applied force
B. momentum
C. restoring force
D. none of them
8 Waves transport energy
A. without transport energy
B. with matter
C. both of them
D. none of them
9 Si units of time period is
A. second
B. hertz
C. revolution
D. vibration/sec
10 The wave motion set up in any medium depends upon:
A. Elasticity
B. Inertia
C. Density
D. All of these

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