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Physics English Medium Fsc Part 1 Chapter 8 Online MCQs Test MCQs With Answers
Question # 1
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 # 2
The apparent change in the pitch of sound due to relative motion is called.
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Carnot theorem
Interference
Doppler effect
Beats
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Question # 3
The distance between the consecutive nodes is
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Question # 4
The speed of sound increases with the increase of in
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Pressure
Volume
Temperature
Density
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Question # 5
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 # 6
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 # 7
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 # 8
Star moving towards the earth show
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Red shift
Blue shift
Green shift
Yellow shift
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Question # 9
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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Question # 10
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 # 11
The distance covered by wave in 1 sec is
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wavelength
Wave number
Wave speed
Frequency
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