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

Si units of time period is

Question # 2

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

Question # 3

Which type of wave can be set up in solids

Question # 4

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:

Question # 5

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

Question # 6

The waves produced in a microwave oven have wavelength.

Question # 7

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

Question # 8

The example of mechanical wave is

Question # 9

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

Question # 10

Which of the following is not mechanical wave?

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

The bob of a simple pendulum is suspended by

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 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
2 The frequency of free vibrations is known as
A. free frequency
B. forced frequency
C. natural frequency
D. un-natural frequency
3 It two waves of amplitude 'a' produce a resultant wave of amplitude a, then the phase difference between them will be
A. 60°
B. 90°
C. 120°
D. 180°
4 Smaller the damping, greater will be the
A. frequency
B. wavelength
C. amplitude
D. none of them
5 Mechanical waves on the surface of a liquid are
A. Transverse
B. Longitudinal
C. Torsional
D. both transverse and longitudinal
6 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
A. Has a definite pitch
B. Has a definite quality
C. Has a definite capacity
D. Can penetrate the wall
7 SI unit of wave length is:
A. Kilometer
B. Metre
C. Centimetre
D. Hertz
8 In transverse waves, the individual particles of the medium move:
A. In circles
B. Perpendicular to the direction of level
C. Parallel to the direction of level
D. None of these
9 SI unit of frequency is
A. second
B. hertz
C. revolution
D. vibrations/sec
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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