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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
According to Newton, sound travels in air under conditions of.
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Adiabatic
Isothermal
Isobaric
Isochoric
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Question # 3
Sound waves are
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Electromagnetic waves
Transverse waves
Compressional waves
Matter waves
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Question # 4
Speed of sound in aluminum at 20
o
C is.
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3600 m/s
5100 m/s
5130 m/s
3500 m/s
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Question # 5
The speed of sound in ari at 0
o
C is 332 ms-1, Then the speed at 40
o
C will be
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372 ms-1
356 ms-1
346 ms-1
332 ms-1
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Question # 6
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 # 7
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 # 8
In stationary waves, the velocity of particle at the node is.
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Maximum
Infinite
Zero
Varible
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Question # 9
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 # 10
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 # 11
the example of mechanical waves is
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Water waves
Infrared waves
Radio waves
Ultraviolet waves
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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
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 # 14
The mechanism of transports energy of all the waves is
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Different
Same
Complicated
Easy
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Question # 15
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 # 16
In stationary waves, the particle velocity at nodes is
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Minimum
Maximum
Zero
Constant
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Question # 17
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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