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Online Tests
Physics Fsc Part 1 Chapter 8 Online Test MCQs With Answers
Question # 1
Stars moving away from Earth show a
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Green shift
Blue shift
Red shift
Yellow shift
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Question # 2
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 # 3
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Question # 4
If 30 waves per second pass through a medium at a speed 30 ms-1, then the wavelength is.
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30 m
15 m
1 m
28 m
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Question # 5
The mechanism of transports energy of all the waves is
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Different
Same
Complicated
Easy
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Question # 6
The distance covered by wave in 1 sec is
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wavelength
Wave number
Wave speed
Frequency
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Question # 7
According to Newton, sound travels in air under conditions of.
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Adiabatic
Isothermal
Isobaric
Isochoric
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Question # 8
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 # 9
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 # 10
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 # 11
The distance between two consecutive crest is called.
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Displacement
Amplitude
Wave front
Wavelength
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Question # 12
If 20 waves passes through he medium in 2 sec of 10 ms-1 then he wavelength is.
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200 m
2 m
1 m
0.5 m
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Question # 13
The speed of sound increases with the increase of in
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Pressure
Volume
Temperature
Density
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Question # 14
Two tuning forks of frequencies 240 Hz and 243 Hz are sounded together, the number of beats per second is.
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Zero
2
3
4
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Question # 15
In transverse waves the particles of medium vibrate
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Along the direction of wave
Opposite to direction of wave
Perpendicular to direction of wave
Slowly
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Question # 16
A stationary waves is established din a string which vibrates in four segments at a frequency of 120 Hz, Its fundamental frequency is.
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15 Hz
30 HZ
60 Hz
480 Hz
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Question # 17
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 # 18
Sound travel faster in
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CO2
H2
O2
He
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