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Online Tests
Physics Fsc Part 1 Chapter 8 Online Test MCQs With Answers
Question # 1
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 # 2
The distance covered by wave in 1 sec is
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wavelength
Wave number
Wave speed
Frequency
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Question # 3
The error in speed of sound calculated by Newton at STP is about.
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0 %
14 %
15 %
16 %
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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 example of mechanical waves is
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Water waves
Infrared waves
Radio waves
Ultraviolet waves
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Question # 6
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 # 7
Star moving towards the earth show
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Red shift
Blue shift
Green shift
Yellow shift
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Question # 8
The speed \velocity of sound is greatest in.
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Air
Steel
Ammonia
Water
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Question # 9
If 332 waves pass through a medium in 1 second with speed of 332 ms-1 then wavelength will be
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7 m
332 m
664 m
1 m
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Question # 10
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 # 11
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 # 12
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 # 13
Stars moving away from Earth show a
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Green shift
Blue shift
Red shift
Yellow shift
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Question # 14
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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Question # 15
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 # 16
Sound travel faster in
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CO2
H2
O2
He
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Question # 17
Diffraction is a special type of
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Reflection
Polarization
Interference
Refraction
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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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Question # 19
The distance between two consecutive crests of troughs is called
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Time period
Wave length
Frequency
Displacement
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Question # 20
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 # 21
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 # 22
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 # 23
A bat finding its correct location by sending
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Matter waves
Ultrasonic waves
Infrasonic waves
electromagnetic waves
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Question # 24
Which of the following is mechanical wave
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Heat
Light
Sound
None of these
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