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

The restoring force always directed towards the

Question # 2

Fidelity refers to

Question # 3

If the mass of the simple pendulum becomes double, its time period

Question # 4

If we increase the length of a simple pendulum four times, its time period will become

Question # 5

When sound waves travel from air to water which of these remains constant?

Question # 6

When a mass 'm' is pulled slowly, the spring stretches by an amount xo, then the work done will be

Question # 7

The velocity of sound in air depends upon

Question # 8

The time required to complete on vibration is called

Question # 9

SI unit of wave length is:

Question # 10

The example of mechanical wave is

Question # 11

Which one is not produced by sound waves in air?

Question # 12

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

Question # 13

The temperature at which the speed of sound becomes double as was at 27°C is

Question # 14

The number of vibrating body at any instant from its equilibrium position is called

Question # 15

Progressive waves of frequency 300 Hz are superimposed in produced a system of stationary waves in which adjacent nodes are 1.5 m apart. What is the speed of the progressive waves?

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 The restoring force always directed towards the
A. extreme position
B. mean position
C. both of them
D. none of them
2 There is no net transfer of energy by particle of medium in
A. Longitudinal wave
B. Transverse wave
C. Progressive wave
D. Stationary wave
3 When temperature increase, the frequency of a tuning fork
A. Increases
B. Decreases
C. Remains same
D. Increase or decreases depending on the material
4 SI unit of frequency is
A. second
B. hertz
C. revolution
D. vibrations/sec
5 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
6 When a mass 'm' is pulled slowly through a distance 'xo' , the elastic potential energy of the spring would be
A. P.E=Kx2o
B. P.E= 1/2kxo
C. P.E=1/2Kx2o
D. P.E=Kx2o
7 The number of vibrating body at any instant from its equilibrium position is called
A. displacement
B. frequency
C. amplitude
D. time period
8 The force which opposes the applied force producing the displacement in the spring is called
A. restoring force
B. periodic force
C. centripetal force
D. resistive force
9 The vibrations of factory floor caused by the running of heavy machinery is an example of
A. free vibration
B. natural vibrations
C. forced vibrations
D. all of them
10 Example of progressive wave is
A. transverse waves
B. longitudinal waves
C. both of them
D. none of them

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