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Physics ECAT Pre Engineering Chapter 8 Waves Online Test MCQs With Answers
Question # 1
When a mass 'm' is pulled slowly, the spring stretches by an amount x
o
, then the work done will be
Choose an answer
W=Kx
o
W=1/2Kx
o
W=1/2Kx
2
o
W=4Kx
o
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Question # 2
The expression of Hook's law is
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F=ma
F=kx
F= -kx
-kx=ma
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Question # 3
The force which opposes the applied force producing the displacement in the spring is called
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restoring force
periodic force
centripetal force
resistive force
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Question # 4
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 # 5
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 # 6
Associated with the motion of a driven harmonic oscillator, there is a very striking phenomenon, know as
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waves
beat
interference
resonance
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Question # 7
Fidelity refers to
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Reproduction of original sound
Reproduction of original image
Reproduction of music
Reproduction of a CD from original copy
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Question # 8
When a mass 'm' is pulled slowly, the spring stretches by an amount x
0
,then the average force would be
Choose an answer
F= Kx
0
F=1/2Kx
0
F=2Kx
0
F=4Kx
0
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Question # 9
The velocity of sound in air not effected by changes in
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Moisture contents in air
Temperature of air
The atmosphere pressure
The composition of air
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Question # 10
Mechanical waves on the surface of a liquid are
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Transverse
Longitudinal
Torsional
both transverse and longitudinal
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Question # 11
The velocity of sound at same temperature is maximum in
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H
2
N
2
O
2
NH
3
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Question # 12
Which of the following does not exhibit S.H.M?
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a plucked violin string
a mass attached to a spring
a train shunting between two terminals
a simple pendulum
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Question # 13
When sound waves travel from air to water which of these remains constant?
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Velocity
Frequency
Wavelength
All the above
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Question # 14
A physical system under going forced vibrations is known as
Choose an answer
Simple harmonic oscillator
Compound harmonic oscillator
Physical harmonic oscillator
driven harmonic oscillator
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Question # 15
At 'resonance' the transfer of energy from deriving source to the oscillator is
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maximum
minimum
zero
none of them
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