ECAT Pre Computer Science Chapter 8 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 8 Waves

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ECAT Physics Chapter 8 Waves

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Question # 1

When temperature increase, the frequency of a tuning fork

Question # 2

The waves in which the particles of the medium have displacement along the direction of propagation of waves are called

Question # 3

The restoring force always directed towards the

Question # 4

The natural frequency of a pendulum which is vibrating freely, depends upon its

Question # 5

A traveling wave has a shape of:

Question # 6

Decibel is unit of

Question # 7

In solids, only following type/s of wave can travel:

Question # 8

The time required to complete on vibration is called

Question # 9

A swing has

Question # 10

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

Question # 11

The velocity of sound is greatest in

Question # 12

The time period of pendulums of different lengths would be

Question # 13

Which of the following does not exhibit S.H.M?

Question # 14

The velocity of sound in air not effected by changes in

Question # 15

The square of 0.4 is:

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 When two progressive waves of nearly same frequencies superimpose and give rise to beats, then
A. Frequency of beat changes with time
B. Frequency of beat changes with location of observer
C. All particles of medium vibrate simple harmonically with frequency equal to the difference between frequencies of component waves
D. Amplitude of vibration of particles at any point changes simple harmonically with frequency equal to difference between two component waves
2 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
3 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
4 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
5 In solids, only following type/s of wave can travel:
A. Transverse
B. Longitudinal
C. Both A and B
D. None of them
6 The weight 'mg' of the bob is resolved into
A. one component
B. two components
C. three components
D. four components
7 At a certain instant a stationary transverse wave is found to have maximum kinetic energy. The appearance of string of that instant is
A. Sinusoidal shape with amplitude A/3
B. Sinusoidal shape with amplitude A/2
C. Sinusoidal shape with amplitude A
D. Straight line
8 Such oscillations in which the amplitude decreases steadily with time, are called
A. resonance
B. force oscillations
C. large oscillations
D. damped oscillations
9 The waves produced in a microwave oven have frequency
A. 2450 Hz
B. 2450 K Hz
C. 2450 M Hz
D. 2450 G Hz
10 Si units of time period is
A. second
B. hertz
C. revolution
D. vibration/sec

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