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Online Tests
Physics English Medium Fsc Part 1 Chapter 8 Online MCQs Test MCQs With Answers
Question # 1
In sonar we use
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Sound waves
Ultrasound waves
Microwaves
Radio waves
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Question # 2
Which of the following is mechanical wave
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Heat
Light
Sound
None of these
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Question # 3
the velocity of sound is maximum at 20
o
C in
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Lead
Copper
Glass
Iron
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Question # 4
When ever the path difference between the waves is integral multiple of half the wavelength, interference will be
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Constructive
Destructive
(-)ve
(+) ve
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Question # 5
Stars moving away from Earth show a
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Green shift
Blue shift
Red shift
Yellow shift
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Question # 6
With increase of temperature, speed of sound.
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Remains constant
Becomes zero
Decreases
Increases
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Question # 7
The speed of sound in air does not depend upon
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Temperature
Pressure
Density
Medium
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Question # 8
When the amplitude of a wave become double, its energy becomes
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One half
Two times
Three times
Four times
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Question # 9
The distance between two consecutive crest is called.
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Displacement
Amplitude
Wave front
Wavelength
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Question # 10
If the wave motion is 0.01 sec and wave speed is 100 ms-1 then frequency of wave is.
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0.5 Hz
1 Hz
10 Hz
100 Hz
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Question # 11
The periodic variations of sound between maximum and minimum loudness are called.
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Doppler's effect
reflection
Laplace correction
Beats
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Question # 12
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