ECAT Pre General Science Physics Chapter 8 MCQ Test With Answer

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

Try The 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

Transverse waves can be set up:

Question # 2

If two waves of length 50 cm and 51 cm produced 12 beats per second, the velocity of sound is

Question # 3

The waves in which the particles of the medium are displaced in a direction perpendicular to the direction of propagation of waves are known as

Question # 4

The process in which energy is dissipated from the oscillating system is known as

Question # 5

Energy is not carried by

Question # 6

A swing has

Question # 7

The wave motion set up in any medium depends upon:

Question # 8

It two waves of amplitude 'a' produce a resultant wave of amplitude a, then the phase difference between them will be

Question # 9

The velocity of sound in air not effected by changes in

Question # 10

To hear a clear echo, the reflecting surface must be at a minimum distance of

Question # 11

When the bob of simple pendulum is at extreme position, its K.E. will be

Question # 12

SI unit of frequency is

Question # 13

The characteristic of a body executing S.H.M is that its acceleration is

Question # 14

One complete round trip of the body about its mean position is called

Question # 15

The waves which propagate out in the space due to oscillations of electric and magnetic fields are called:

Question # 16

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

Question # 17

Which one of the following elasticizes is possessed by fluids:

Question # 18

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

Question # 19

For a body executing S. H. M, its

Question # 20

Fluids can transmit:

Question # 21

A second's pendulum is a pendulum whose time period is

Question # 22

In transverse waves, the individual particles of the medium move:

Question # 23

A heavily damped system has a fairly

Question # 24

Acceleration of the mass at any instant is given by

Question # 25

The time period of pendulums of different lengths would be

Question # 26

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?

Question # 27

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

Question # 28

A wave, which transfer energy by moving away from the source of disturbance is called a

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 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
2 The phase determines the
A. displacement
B. amplitude
C. frequency
D. state of motion of vibrating body
3 If one end of a rubber cord is fixed with a support and the other end is wiggled by hand, the waves generated on the card are:
A. Stationary waves
B. Transverse waves
C. Both of these
D. None of these
4 Velocity of sound in vacuum (in m/s) is
A. 330
B. 1000
C. 156
D. 0
5 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
6 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
7 The speed of sound in a medium depends on
A. The elastic property but not on the inertia property
B. The inertia property but not on the elastic property
C. The elastic property as well as the inertia property
D. Neither the elastic property nor the inertia property
8 If a simple pendulum is shifted from karachi to K-2 cliff, its time period
A. remains the same
B. decreases
C. increases
D. none of them
9 The bob of a simple pendulum is suspended by
A. string
B. heavy inextensible string
C. light extensible string
D. light inextensible string
10 A second's pendulum is a pendulum whose time period is
A. 1 second
B. 2 seconds
C. 3 seconds
D. 4 seconds

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