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

Laplace formula is derived from

Question # 2

Decibel is unit of

Question # 3

The vibratory motion of a body whose magnitude of acceleration is directly proportional to the magnitude of its displacement and is always directed towards the equilibrium position is called

Question # 4

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

Question # 5

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

Question # 6

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 # 7

The total energy of spring mass system is

Question # 8

The speed of sound in a medium depends on

Question # 9

Shock absorber of the car is an example of

Question # 10

The bob of a simple pendulum is suspended by

Question # 11

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

Question # 12

In solids, only following type/s of wave can travel:

Question # 13

The frequency of free vibrations is known as

Question # 14

The distance covered by the wave in one second is:

Question # 15

Two sources of sound are said to be coherent if

Question # 16

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

Question # 17

SI unit of frequency is

Question # 18

The damping depends upon the

Question # 19

At a certain instant a stationary transverse wave is found to have maximum kinetic energy. The appearance of string of that instant is

Question # 20

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

Question # 21

The velocity of sound at same temperature is maximum in

Question # 22

Acceleration of the mass at any instant is given by

Question # 23

A body is executing free vibrations when it oscilates

Question # 24

The waves in which the particles of the medium have displacement along the direction of propagation of waves are called

Question # 25

A traveling wave has a shape of:

Question # 26

When two progressive waves of nearly same frequencies superimpose and give rise to beats, then

Question # 27

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

Question # 28

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

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 A wave, which transfer energy by moving away from the source of disturbance is called a
A. progressive wave
B. travelling wave
C. both of them
D. none of them
2 The number of vibrating body at any instant from its equilibrium position is called
A. displacement
B. frequency
C. amplitude
D. time period
3 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
4 When a body is pulled away from its rest or equilibrium position and then released, the body oscillates due to
A. applied force
B. momentum
C. restoring force
D. none of them
5 In the resonance condition, the amplitude of the oscillator becomes
A. very large
B. very small
C. zero
D. any one of them
6 The vibratory motion of a body whose magnitude of acceleration is directly proportional to the magnitude of its displacement and is always directed towards the equilibrium position is called
A. rotatory motion
B. motion under gravity
C. angular motion
D. simple harmonic motion
7 An object undergoes S.H.M has maximum acceleration when its displacement form the means position
A. maximum
B. zero
C. half of the maximum value
D. one third of the maximum value
8 The waves which propagate by the collision of material particles are known as
A. e.m. waves
B. mechanical waves
C. light waves
D. microwaves
9 The waves which propagate out in space due to oscillation of electric and magnetic fields are known as
A. e.m. waves
B. mechanical waves
C. sound waves
D. water waves
10 The velocity of sound in air not effected by changes in
A. Moisture contents in air
B. Temperature of air
C. The atmosphere pressure
D. The composition of air

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