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

The expression of Hook's law is

Question # 2

A stationary sound wave has frequency 165 Hz (speed of sound in air = 330 m/s) then distance between two consecutive nodes is

Question # 3

Smaller the damping, greater will be the

Question # 4

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

Question # 5

Energy is not carried by

Question # 6

The temperature at which the speed of sound becomes double as was at 27°C is

Question # 7

The restoring force always directed towards the

Question # 8

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

Question # 9

A body is executing free vibrations when it oscilates

Question # 10

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

Question # 11

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 # 12

For production of beats the two sources must have

Question # 13

Decibel is unit of

Question # 14

Which one of the following wave motions is transverse:

Question # 15

The wave motion set up in any medium depends upon:

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 The wave form of S.H.M will be
A. square wave
B. sine wave
C. rectified wave
D. saw-tooth wave
2 In a resonance situation the amplitude of the motion may become extra ordinarily large, if
A. the driving force is large
B. the driving force is zero
C. the driving force may be feeble
D. all of them
3 The weight 'mg' of the bob is resolved into
A. one component
B. two components
C. three components
D. four components
4 The loudness and pitch of a sound note depends on
A. Intensity and velocity
B. Frequency and velocity
C. Intensity and frequency
D. Frequency and number of harmonic
5 The temperature at which the speed of sound becomes double as was at 27°C is
A. 273°C
B. 0°C
C. 927°C
D. 1027°C
6 In case of mechanical waves, we study the motion of
A. a single particle
B. collection of particle
C. any one of them
D. none of them
7 SI unit of wave length is:
A. Kilometer
B. Metre
C. Centimetre
D. Hertz
8 Which of the following medium/media can transmit both transverse and longitudinal waves:
A. Solids
B. Liquids
C. Gases
D. All of them
9 When the particles of the medium vibrate about their mean position, along the direction of the motion of waves, then the waves are called:
A. Longitudinal waves
B. Transverse waves
C. Water waves
D. Complex waves
10 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

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