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Online Tests
Physics Fsc Part 1 Chapter 8 Online Test MCQs With Answers
Question # 1
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 # 2
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 # 3
Sound travel faster in
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CO2
H2
O2
He
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Question # 4
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 # 5
The experimental value for the velocity of sound in air is
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233 m-sec
-1
333 m-sec
-1
433 m-sec
-1
533 m-sec
-1
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Question # 6
The mechanism of transports energy of all the waves is
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Different
Same
Complicated
Easy
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Question # 7
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 # 8
The distance between two consecutive trough is called.
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Displacement
Amplitude
Wave length
Wave front
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Question # 9
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 # 10
In stationary waves the points which always remain at rest are.
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Nodes
Antinodes
Crest
Trough
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Question # 11
The speed of sound in air does not depend upon
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Temperature
Pressure
Density
Medium
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Question # 12
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 # 13
the velocity of sound is maximum at 20
o
C in
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Lead
Copper
Glass
Iron
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Question # 14
Speed of sound in vacuum is
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280 ms-1
332 ms-1
333 ms-1
Zero ms-1
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Question # 15
the example of mechanical waves is
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Water waves
Infrared waves
Radio waves
Ultraviolet waves
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Question # 16
A set of frequencies which are multiples of the fundamental frequency are called.
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Doppler effect
Nodal frequencies
Beat frequencies
Hamonics
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Question # 17
Star moving towards the earth show
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Red shift
Blue shift
Green shift
Yellow shift
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