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Online Tests
Physics Fsc Part 1 Chapter 8 Online Test MCQs With Answers
Question # 1
The distance covered by wave in 1 sec is
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wavelength
Wave number
Wave speed
Frequency
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Question # 2
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 # 3
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 # 4
Who did give the correct formula for the speed of sound in air?
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Boyle
Laplace
Newton
Einstein
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Question # 5
The state of human blood flow can be found by using.
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Newton's formula of speed of sound
Interference of sound
Phenomena of beats
Doppler's effect of sound
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Question # 6
In which medium the speed of sound is greater.
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Oxygen
Air
Water
copper
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Question # 7
When sound waves enter in different medium, the quantity that remains unchanged is.
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Intensity
Speed
Frequency
Wave length
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Question # 8
In stationary waves, the particle velocity at nodes is
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Minimum
Maximum
Zero
Constant
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Question # 9
According to Newton, sound travels in air under conditions of.
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Adiabatic
Isothermal
Isobaric
Isochoric
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Question # 10
Wavelength of a wave for closed pipe having length 'l' in the fundamental mode is.
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2 l
1/2
4 l
l
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Question # 11
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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Question # 12
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 # 13
the louder the sound, the greater will be its.
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Speed
Frequency
Amplitude
Wave length
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Question # 14
the example of mechanical waves is
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Water waves
Infrared waves
Radio waves
Ultraviolet waves
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Question # 15
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 # 16
The speed of sound increases with the increase of in
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Pressure
Volume
Temperature
Density
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Question # 17
If 30 waves per second pass through a medium at a speed 30 ms-1, then the wavelength is.
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30 m
15 m
1 m
28 m
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Question # 18
On loading the prong of a tuning fork with wax, the frequency of sound.
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Increases
Decreases
Remains same
First increases then decrease
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