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Online Tests
Physics Fsc Part 1 Chapter 8 Online Test MCQs With Answers
Question # 1
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 # 2
The distance between two consecutive crest is called.
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Displacement
Amplitude
Wave front
Wavelength
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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
In stationary waves the points which always remain at rest are.
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Nodes
Antinodes
Crest
Trough
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Question # 5
The speed of sound in air does not depend upon
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Temperature
Pressure
Density
Medium
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Question # 6
Sound wave can not be
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Reflected
Refracted
Diffracted
Polarized
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Question # 7
Half wavelength corresponds to
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0
o
90
o
180
o
360
o
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Question # 8
Increase in the velocity of sound in air for 1
o
C rise in temperature is.
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61 ms-1
0.61 ms-1
161 ms-1
261 ms-1
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Question # 9
Increase in speed of sound for 1
o
C rise in temperature is.
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0.61 ms-1
0.61 cms-1
61 ms-1
6.1 ms-1
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Question # 10
The periodic variations of sound between maximum and minimum loudness are called.
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Doppler's effect
reflection
Laplace correction
Beats
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Question # 11
In stationary waves, the particle velocity at nodes is
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Minimum
Maximum
Zero
Constant
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Question # 12
Teh speed of sound in air is 340 m/s. If the pressure of air is doubled then the speed becomes.
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Double
Half
Four times
Remains same
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Question # 13
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 # 14
A stretched string 2 m long and it has 2 hopes of stationary waves hen the wavelength is
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4 m
2 m
3 m
1 m
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Question # 15
Which of the following is mechanical wave
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Heat
Light
Sound
None of these
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Question # 16
Waves transport energy without transporting
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Matter
Force
Momentum
All of these
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Question # 17
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 # 18
The speed of sound in air would become double than ots speed at 10
o
C at a temperature of.
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313
o
C
586
o
C
859
o
C
899
o
C
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