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Online Tests
Physics Fsc Part 1 Chapter 8 Online Test MCQs With Answers
Question # 1
If a stretched string 4 m long and it has 4 loops of stationary waves, then the wave length is.
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1m
2 m
3 m
4 m
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Question # 2
In vibrating string, the points where the amplitude is maximum are called.
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Nodes
Antinodes
Troughs
Crests
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Question # 3
The speed of sound increases with the increase of in
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Pressure
Volume
Temperature
Density
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Question # 4
Diffraction is a special type of
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Reflection
Polarization
Interference
Refraction
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Question # 5
If 20 waves passes through he medium in 2 sec of 10 ms-1 then he wavelength is.
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200 m
2 m
1 m
0.5 m
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Question # 6
In stationary waves, the velocity of particle at the node is.
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Maximum
Infinite
Zero
Varible
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Question # 7
With increase of temperature, speed of sound.
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Remains constant
Becomes zero
Decreases
Increases
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Question # 8
In order to produce beats, the two sound waves should have.
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The same amplitude
Slightly different amplitude
The same frequency
slightly different frequencies.
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Question # 9
the example of mechanical waves is
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Water waves
Infrared waves
Radio waves
Ultraviolet waves
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Question # 10
the louder the sound, the greater will be its.
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Speed
Frequency
Amplitude
Wave length
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Question # 11
Two waves of same frequency and moving in the same direction produces.
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Interference
Diffraction
Beats
Stationary waves
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Question # 12
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 # 13
Half wavelength corresponds to
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0
o
90
o
180
o
360
o
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Question # 14
the velocity of sound at 0
o
C is 332 ms-1, the velocity of sound at 10
o
C will be
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337.1 ms-1
338.1 ,ms-1
342.1 ms-1
328.1 ms-1
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Question # 15
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 # 16
The pitch of sound deepens upon
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Intensity of sound
Loudness of sound
Wavelength of sound
Frequency of sound
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Question # 17
According to Newton's formula, the speed of sound in air at STP is
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332 ,ms-1
340 ms-1
350 ms-1
280 ms-1
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Question # 18
Two tunign forks of frequencies 260 Hz and 256 Hz are sounded together , the number of beats per second is.
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2
258
516
4
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