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Physics ECAT Pre Engineering Chapter 8 Waves Online Test MCQs With Answers
Question # 1
The expression for restoring force is
Choose an answer
F=ma
F=kx
F= -kx
Kx=ma
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Question # 2
To hear a clear echo, the reflecting surface must be at a minimum distance of
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10 m
16.5 m
33 m
66 m
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Question # 3
Example of vibratory motion is
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mass suspended from a spring
a bob of simple pendulum
mass attached to a spring placed
all of them
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Question # 4
Velocity of sound in a diatomic as is 300 m/sec. what is its rms velocity?
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400 m/sec
40 m/sec
430 m/sec
300 m/sec
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Question # 5
Wave disturbances may also come in a concentrated bundle, like shock wave from an aeroplane flying at
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subsonic speed
sonic speed
super sonic speed
any one of them
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Question # 6
In the formula for finding the speed of waves in the spring, unit of m in SIn units is:
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kg
kg-meter
kg/meter
Meter/kg
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Question # 7
The number of vibrating body at any instant from its equilibrium position is called
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displacement
frequency
amplitude
time period
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Question # 8
There is no net transfer of energy by particle of medium in
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Longitudinal wave
Transverse wave
Progressive wave
Stationary wave
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Question # 9
A weakly damped system has fairly
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sharp resonance curve
flat resonance curve
both of them
none of them
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Question # 10
The velocity of sound is greatest in
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Water
Air
Vacuum
Metal
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Question # 11
Which of the following is/are example/s if mechanical waves i.e. waves generated in _______:
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Rope
Coil of spring
Water
All of them
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Question # 12
Time period of a simple pendulum depends upon the
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length of the pendulum
acceleration due to gravity
none of them
both of them
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Question # 13
The wave form of S.H.M will be
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square wave
sine wave
rectified wave
saw-tooth wave
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Question # 14
The wave motion set up in any medium depends upon:
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Elasticity
Inertia
Density
All of these
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Question # 15
When a body moves to and fro motion, this type of motion is called
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translatory motion
circular motion
oscillatory motion
all of them
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Question # 16
SI unit of wave length is:
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Kilometer
Metre
Centimetre
Hertz
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