ECAT Pre Engineering Physics Chapter 8 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 8 Waves

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

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Physics ECAT Pre Engineering Chapter 8 Waves

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Question # 1

If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be

Question # 2

Time period of simple pendulum is independent of

Question # 3

For production of beats the two sources must have

Question # 4

In stationary waves

Question # 5

If the external driving force is periodic with a period compareable to the natural period of the oscillator, then we get

Question # 6

Which one of the following wave motions is transverse:

Question # 7

The waves in which the particles of the medium are displaced in a direction perpendicular to the direction of propagation of waves are known as

Question # 8

When temperature increase, the frequency of a tuning fork

Question # 9

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

Question # 10

The expression of Hook's law is

Question # 11

A second's pendulum is a pendulum whose time period is

Question # 12

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

Question # 13

SI unit of frequency is

Question # 14

Which one is not produced by sound waves in air?

Question # 15

Wave disturbances may also come in a concentrated bundle, like shock wave from an aeroplane flying at

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 To hear a clear echo, the reflecting surface must be at a minimum distance of
A. 10 m
B. 16.5 m
C. 33 m
D. 66 m
2 Fluids can transmit:
A. Transverse wave
B. Compressional wave
C. Both of them
D. None of them
3 Longitudinal waves are also called:
A. Congressional waves
B. Transverse waves
C. Radio waves
D. None of them
4 Decibel is unit of
A. Intensity of light
B. x-ray radiation capacity
C. sound loudness
D. Energy of radiation
5 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
6 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
7 As the bob of the pendulum moves to and fro which of the force is experienced by the bob
A. its weight
B. tension in the string
C. viscous drag force by air
D. all of them
8 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
9 Progressive waves of frequency 300 Hz are superimposed in produced a system of stationary waves in which adjacent nodes are 1.5 m apart. What is the speed of the progressive waves?
A. 100 ms-1
B. 200 ms-1
C. 450 ms-1
D. 900 ms-1
10 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

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