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Online Tests
11th Class Part 1 Physics Chapter 8 Test Online MCQs With Answers
Question # 1
On loading the prong of a tuning fork with wax, the frequency of sound.
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Increases
Decreases
Remains same
First increases then decrease
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Question # 2
The distance between two consecutive crests of troughs is called
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Time period
Wave length
Frequency
Displacement
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Question # 3
Frequency range of hearing of cats is.
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20-20000 Hz
10- 10000 Hz
60-20000 Hz
60-70000 Hz
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Question # 4
In stationary waves, the velocity of particle at the node is.
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Maximum
Infinite
Zero
Varible
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Question # 5
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 # 6
Star moving towards the earth show
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Red shift
Blue shift
Green shift
Yellow shift
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Question # 7
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 # 8
Crests and trough are formed in.
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Longitudinal waves
transverse waves
Stationary waves
Compression waves
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Question # 9
The distance between the consecutive nodes is
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Question # 10
The mechanism of transports energy of all the waves is
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Different
Same
Complicated
Easy
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Question # 11
In stationary waves the points which always remain at rest are.
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Nodes
Antinodes
Crest
Trough
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Question # 12
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 # 13
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 # 14
When two waves of same frequency travel in opposite direction, the phenomenon will be
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Diffraction
Stationary waves
Polarization
Interference
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Question # 15
When the amplitude of a wave become double, its energy becomes
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One half
Two times
Three times
Four times
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Question # 16
The speed of sound increases with the increase of in
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Pressure
Volume
Temperature
Density
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Question # 17
Two tunign forks of frequencies 260 Hz and 256 Hz are sounded together , the number of beats per second is.
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2
258
516
4
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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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