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

Decibel is unit of

Question # 2

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

Question # 3

Velocity of sound in vacuum (in m/s) is

Question # 4

An object undergoes S.H.M has maximum speed when its displacement from the mean position is

Question # 5

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

Question # 6

If F=0.04 N and X=4 cm then K=

Question # 7

A physical system under going forced vibrations is known as

Question # 8

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

Question # 9

The wave form of S.H.M will be

Question # 10

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

Question # 11

SI unit of frequency is

Question # 12

Which of the following medium/media can transmit both transverse and longitudinal waves:

Question # 13

Data transmitted along glass-fiber cables is in the form of pulses of monochromatic red light each of duration 2.5 ns. Which of the following is the best estimate of the number of wavelength in each pulse?

Question # 14

The total energy of spring mass system is

Question # 15

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

Question # 16

The expression of Hook's law is

Question # 17

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

Question # 18

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

Question # 19

At 'resonance' the transfer of energy from deriving source to the oscillator is

Question # 20

The expression for restoring force is

Question # 21

What is frequency of radio waves transmitted by a station, if the wavelength of those waves is 300 m?

Question # 22

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

Question # 23

Two sound waves of slightly different frequencies propagating in the same direction produce beats due to

Question # 24

A body is executing free vibrations when it oscilates

Question # 25

Time period of a simple pendulum depends upon the

Question # 26

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

Question # 27

For a body executing S. H. M, its

Question # 28

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 # 29

The distance covered by the wave in one second is:

Question # 30

The bob of a simple pendulum is suspended by

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 The number of vibrating body at any instant from its equilibrium position is called
A. displacement
B. frequency
C. amplitude
D. time period
2 The waves which propagate through the oscillations of material particles are known as:
A. Mechanical waves
B. Electromagnetic waves
C. Any of them
D. None of them
3 Smaller the damping, greater will be the
A. frequency
B. wavelength
C. amplitude
D. none of them
4 The instantaneous velocity of a body moving along a circle is directed
A. along the radius
B. along the tangent
C. away from the circle
D. none of them
5 If the displacement of a body executing S.H.M is plotted against time, then the curve is known as
A. frequency of S.H.M
B. period of S.H.M
C. wave form
D. none of them
6 Which of the following is/are example/s if mechanical waves i.e. waves generated in _______:
A. Rope
B. Coil of spring
C. Water
D. All of them
7 Which of the following is an example of a S.H.M?
A. motion of a projectile
B. motion of a train along a circular path
C. motion of swing
D. electrons revolving sound the nucleus
8 When an oscillatory motion repeats itself, then this type of motion is called
A. vibratory motion
B. constant motion
C. fixed motion
D. periodic motion
9 Acceleration of the mass at any instant is given by
A. a=k/m x
B. a= - m/k x
C. a = - k/m x
D. a=m/k x
10 When a body is performing S.H.M., its acceleration is
A. inversely proportional to the displacement
B. directly proportional to the applied force
C. directly proportional to the amplitude
D. directly proportional to the displacement but in opposite direction

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