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Online Tests
Physics ECAT Pre Engineering Chapter 8 Waves Online Test MCQs With Answers
Question # 1
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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60
°
90
°
120
°
180
°
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Question # 2
A wave, which transfer energy by moving away from the source of disturbance is called a
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progressive wave
travelling wave
both of them
none of them
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Question # 3
Two sources of sound are said to be coherent if
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The produce sounds of equal intensity
They produce sounds of equal frequency
They produce sound waves vibrating with the same phase
They produce sound waves with zero or constant phase difference all instant of time
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Question # 4
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 # 5
The damping depends upon the
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amplitude
sharpness
both of them
none of them
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Question # 6
A stationary sound wave has frequency 165 Hz (speed of sound in air = 330 m/s) then distance between two consecutive nodes is
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2 m
1 m
0.5 m
4 m
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Question # 7
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 # 8
If two waves of length 50 cm and 51 cm produced 12 beats per second, the velocity of sound is
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360 m/s
306 m/s
331 m/s
340 ms
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Question # 9
When temperature increase, the frequency of a tuning fork
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Increases
Decreases
Remains same
Increase or decreases depending on the material
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Question # 10
In transverse waves, the individual particles of the medium move:
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In circles
Perpendicular to the direction of level
Parallel to the direction of level
None of these
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Question # 11
If the length of a simple pendulum is 0.25 m its time period would be
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1.0 s
2.0 s
3.0 s
4.0 s
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Question # 12
Time period of simple pendulum is independent of
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length
mass
acceleration due to gravity
none of them
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Question # 13
At a certain instant a stationary transverse wave is found to have maximum kinetic energy. The appearance of string of that instant is
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Sinusoidal shape with amplitude A/3
Sinusoidal shape with amplitude A/2
Sinusoidal shape with amplitude A
Straight line
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Question # 14
The frequency of free vibrations is known as
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free frequency
forced frequency
natural frequency
un-natural frequency
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Question # 15
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 # 16
The waves which propagate out in space due to oscillation of electric and magnetic fields are known as
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e.m. waves
mechanical waves
sound waves
water waves
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