ECAT Pre Computer Science Chapter 8 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 8 Waves

Try The MCQ's Test For ECAT Physics Chapter 8 Waves

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ECAT Physics Chapter 8 Waves

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Question # 1

Mechanical waves on the surface of a liquid are

Question # 2

The resonance will be sharp, if the amplitude decreases rapidly at a frequency

Question # 3

In compressional wave,the layer of medium having reduced pressure is called:

Question # 4

Which one of the following elasticizes is possessed by fluids:

Question # 5

Two sources of sound are said to be coherent if

Question # 6

When a mass 'm' is pulled slowly through a distance 'xo' , the elastic potential energy of the spring would be

Question # 7

A string is stretched between two points and is plucked at right angles to its length, the vibration produced is:

Question # 8

If a freely oscillating system is subjected to an external force, then

Question # 9

The wave motion set up in any medium depends upon:

Question # 10

Which of the following is the longitudinal waves?

Question # 11

If the displacement of a body executing S.H.M is plotted against time, then the curve is known as

Question # 12

Resonance occurs when one of the natural frequencies of vibration of the forced or driven harmonic oscillator

Question # 13

When a body is performing S.H.M., its acceleration is

Question # 14

The time required to complete on vibration is called

Question # 15

When the particles of the medium vibrate about their mean position, along the direction of the motion of waves, then the waves are called:

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 Example of vibratory motion is
A. mass suspended from a spring
B. a bob of simple pendulum
C. mass attached to a spring placed
D. all of them
2 As the bob of the pendulum moves to and fro which of the force is experienced by the bob
A. its weight
B. tension in the string
C. viscous drag force by air
D. all of them
3 If the length of second pendulum becomes four times then its time period will become
A. Four time
B. Two times
C. Six times
D. Eight times
4 The loudness and pitch of a sound note depends on
A. Intensity and velocity
B. Frequency and velocity
C. Intensity and frequency
D. Frequency and number of harmonic
5 Resonance occurs when one of the natural frequencies of vibration of the forced or driven harmonic oscillator
A. greater than the frequency of applied force
B. equal to the frequency of applied force
C. less than the frequency of applied force
D. all of them
6 If a wave can be polarized, it must be
A. An electromagnetic wave
B. A longitudinal wave
C. A progressive wave
D. A transverse wave
7 The weight 'mg' of the bob is resolved into
A. one component
B. two components
C. three components
D. four components
8 When a mass 'm' is pulled slowly, the spring stretches by an amount xo, then the work done will be
A. W=Kxo
B. W=1/2Kxo
C. W=1/2Kx2o
D. W=4Kxo
9 SI unit of frequency is
A. second
B. hertz
C. revolution
D. vibrations/sec
10 If the length of a simple pendulum is 0.25 m its time period would be
A. 1.0 s
B. 2.0 s
C. 3.0 s
D. 4.0 s

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