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Online Tests
Physics Fsc Part 1 Chapter 8 Online Test MCQs With Answers
Question # 1
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 # 2
10 waves pass through a point in 2 seconds with speed 10 ms-1 the frequency of wave will be
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1 Hz
2 Hz
5 Hz
10 Hz
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Question # 3
When two waves having same frequency traveling in same direction combine, phenomenon is called
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Wave motion
Combination of waves
Interference
Diffraction
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Question # 4
The speed of stars and galaxies can be calculated by
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Compton effect
Stefan's law
Doppler's effect
Pascal's law
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Question # 5
The speed of sound is greater in solids due to their high.
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Density
Pressure
Temperature
Elasticity
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Question # 6
Stationary waves are generated on a string of high l, if tension is increased , frequency of vibration will
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Decrease
Unchanged
Half
Increases
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Question # 7
Which of the following is mechanical wave
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Heat
Light
Sound
None of these
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Question # 8
The waves used in radar speed trap are
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Longitudinal
Sound wave
Micro waves
Matter waves
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Question # 9
The portion of the wave above mean level is called.
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Node
Antinode
Crest
Trough
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Question # 10
In transverse waves the particles of medium vibrate
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Along the direction of wave
Opposite to direction of wave
Perpendicular to direction of wave
Slowly
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Question # 11
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 # 12
Diffraction is a special type of
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Reflection
Polarization
Interference
Refraction
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Question # 13
The wavelength of fundamental note in one end closed pipe in term of length 'l' of pipe is.
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4 l
2l
l
1/4 l
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Question # 14
the louder the sound, the greater will be its.
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Speed
Frequency
Amplitude
Wave length
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Question # 15
Two tuning forks of frequencies 240 Hz and 243 Hz are sounded together, the number of beats per second is.
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Zero
2
3
4
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Question # 16
The process followed by Newton for the determination of speed of sound in air is
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Adiabatic
Isothermal
Isobaric
Isochoric
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Question # 17
The speed \velocity of sound is greatest in.
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Air
Steel
Ammonia
Water
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