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

The principle of superposition states that

Question # 2

If the length of a simple pendulum is 0.25 m its time period would be

Question # 3

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

Question # 4

Shock absorber of the car is an example of

Question # 5

The velocity of sound in air depends upon

Question # 6

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

Question # 7

Time period of simple pendulum is independent of

Question # 8

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

Question # 9

The distance covered by the wave in one second is:

Question # 10

Which of the following is not mechanical wave?

Question # 11

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

Question # 12

The expression of Hook's law is

Question # 13

Transverse waves can be set up:

Question # 14

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

Question # 15

In the formula for finding the speed of waves in the spring, unit of m in SIn units is:

Question # 16

While describing the motion of a simple pendulum, the frictional effects are

Question # 17

An object undergoes S.H.M has maximum acceleration when its displacement form the means position

Question # 18

The resonance will be sharp, if the amplitude decreases rapidly at a frequency

Question # 19

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

Question # 20

The distance covered by the wave during one period is called its:

Question # 21

The waves produced in a microwave oven have frequency

Question # 22

Crests and troughs are formed in:

Question # 23

The restoring force always directed towards the

Question # 24

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

Question # 25

The bob of a simple pendulum is suspended by

Question # 26

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

Question # 27

Energy is dissipated and consequently the energy mass system do not oscillate indefinitely because of

Question # 28

If the time period a simple pendulum is 2 s, its frequency would be

Question # 29

Ultra-violet rays differ from X-rays in that they

Question # 30

When a body is pulled away from its rest or equilibrium position and then released, the body oscillates due to

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 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
2 Velocity of sound in a diatomic as is 300 m/sec. what is its rms velocity?
A. 400 m/sec
B. 40 m/sec
C. 430 m/sec
D. 300 m/sec
3 If the mass of the simple pendulum becomes double, its time period
A. increase
B. decreases
C. remains constant
D. none of them
4 A string is stretched between two points and is plucked at right angles to its length, the vibration produced is:
A. Longitudinal wave
B. Transverse wave
C. No vibration at all
D. None of them
5 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
6 A second's pendulum is a pendulum whose time period is
A. 1 second
B. 2 seconds
C. 3 seconds
D. 4 seconds
7 In compressional wave,the layer of medium having reduced pressure is called:
A. Compression
B. Elasticity
C. Node
D. Rarefaction
8 A body is executing free vibrations when it oscilates
A. with the interference of an external force
B. without the interference of an external force
C. with the interference of an internal force
D. none of them
9 Longitudinal waves are also called:
A. Congressional waves
B. Transverse waves
C. Radio waves
D. None of them
10 When the bob of simple pendulum is at extreme position, its K.E. will be
A. maximum
B. minimum
C. zero
D. all of them

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