ECAT Pre Computer Science Chapter 8 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 8 Waves

Try The MCQ's Test For ECAT Physics Chapter 8 Waves

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ECAT Physics Chapter 8 Waves

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Question # 1

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

Question # 2

Laplace formula is derived from

Question # 3

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

Question # 4

Mechanical waves on the surface of a liquid are

Question # 5

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

Question # 6

The instantaneous velocity of a body moving along a circle is directed

Question # 7

Si units of time period is

Question # 8

Which waves are used in sonography?

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

Through which character we can distinguish the light waves from sound waves

Question # 13

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

Question # 14

Acceleration of the mass at any instant is given by

Question # 15

The expression of Hook's law is

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 If the time period a simple pendulum is 2 s, its frequency would be
A. 2 Hz
B. 1.5 Hz
C. 1.0 Hz
D. 0.5 Hz
4 Ultra-violet rays differ from X-rays in that they
A. Cannot be diffracted
B. Cannot be polarized
C. Have a lower frequency
D. Are deviated when they pass through a magnetic field
5 For a body executing S. H. M, its
A. momentum remains constant
B. potential energy remains constant
C. kinetic energy remains constant
D. total energy remains constant
6 If the mass of the simple pendulum becomes double, its time period
A. increase
B. decreases
C. remains constant
D. none of them
7 Of the following, the option ______ reminds of longitudinal waves.
A. Sound waves
B. Heat waves
C. Electromagnetic waves
D. Light waves
8 If a freely oscillating system is subjected to an external force, then
A. free vibrations will take place
B. the body will move with its natural frequency
C. forced vibrations will take place
D. none of them
9 When a mass 'm' is pulled slowly, the spring stretches by an amount xo, then the work done will be
A. W=Kxo
B. W=1/2Kxo
C. W=1/2Kx2o
D. W=4Kxo
10 Velocity of sound in vacuum (in m/s) is
A. 330
B. 1000
C. 156
D. 0

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