ECAT Pre General Science Physics Chapter 8 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 8 Waves

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ECAT Pre General Science Physics Chapter 8 Waves

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Question # 1

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

Question # 2

The force which opposes the applied force producing the displacement in the spring is called

Question # 3

The vibratory or oscillatory motion of a body is

Question # 4

Longitudinal waves are also called:

Question # 5

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

Question # 6

If the external driving force is periodic with a period compareable to the natural period of the oscillator, then we get

Question # 7

A simple pendulum consists of a

Question # 8

A traveling wave has a shape of:

Question # 9

In case of mechanical waves, we study the motion of

Question # 10

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

Question # 11

A body is executing free vibrations when it oscilates

Question # 12

If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be

Question # 13

The time required to complete on vibration is called

Question # 14

The velocity of sound is greatest in

Question # 15

Of the following, the option ______ reminds of longitudinal waves.

Question # 16

Acceleration of the mass at any instant is given by

Question # 17

Which of the following changes at an antinode in a stationary wave?

Question # 18

Example of progressive wave is

Question # 19

There is no net transfer of energy by particle of medium in

Question # 20

Fidelity refers to

Question # 21

The waves which propagate out in space due to oscillation of electric and magnetic fields are known as

Question # 22

In stationary waves

Question # 23

If the length of second pendulum becomes four times then its time period will become

Question # 24

When two waves with same frequency and constant phase difference phase difference interfere

Question # 25

When temperature increase, the frequency of a tuning fork

Question # 26

The distance covered by the wave in one second is:

Question # 27

When half of the cycle of a body executing S.H.M is completed, then the phase of the vibration will be

Question # 28

For transmission of both transverse and longitudinal waves, we can use:

Question # 29

As the bob of the pendulum moves to and fro which of the force is experienced by the bob

Question # 30

Si units of time period is

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 The waves produced in a microwave oven have frequency
A. 2450 Hz
B. 2450 K Hz
C. 2450 M Hz
D. 2450 G Hz
2 The resonance will be sharp, if the amplitude decreases rapidly at a frequency
A. equal to the resonant frequency
B. slight different from the resonant frequency
C. greatly different from the resonant frequency
D. any one of them
3 Which of the following is the longitudinal waves?
A. Sound waves
B. Waves on plucked string
C. Water waves
D. Light waves
4 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
5 If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be
A. Increasing by a factor of 2
B. Decreasing by a factor of 2
C. Decreasing by a factor of 4
D. Unchanged
6 The portion of the water above its mean level forms a:
A. Crest
B. Trough
C. Both A and B
D. None of these
7 When the bob of simple pendulum is at mean position, its K.E will be
A. maximum
B. minimum
C. zero
D. all of them
8 Energy is dissipated and consequently the energy mass system do not oscillate indefinitely because of
A. very small energy
B. very large energy
C. frictional forces
D. acceleration due to gravity
9 It is possible to recognize a person by hearing his voice even if he is hidden behind a solid wall. This is due to the fact that his voice
A. Has a definite pitch
B. Has a definite quality
C. Has a definite capacity
D. Can penetrate the wall
10 The distance covered by the wave in one second is:
A. Wave number
B. Wave length
C. Frequency
D. Wave speed

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