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

When a body is pulled away from its rest or equilibrium position and then released, the body oscillates due to

Question # 2

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

Question # 3

Decibel is unit of

Question # 4

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 # 5

The phase determines the

Question # 6

The time period of pendulums of different lengths would be

Question # 7

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

Question # 8

Which one of the following is an example of resonance

Question # 9

A heavily damped system has a fairly

Question # 10

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

Question # 11

The waves produced in a microwave oven have frequency

Question # 12

Sound waves in air always

Question # 13

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 # 14

transverse wave motion is possible in:

Question # 15

The damping depends upon the

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 Decibel is unit of
A. Intensity of light
B. x-ray radiation capacity
C. sound loudness
D. Energy of radiation
2 Associated with the motion of a driven harmonic oscillator, there is a very striking phenomenon, know as
A. waves
B. beat
C. interference
D. resonance
3 A physical system under going forced vibrations is known as
A. Simple harmonic oscillator
B. Compound harmonic oscillator
C. Physical harmonic oscillator
D. driven harmonic oscillator
4 When temperature increase, the frequency of a tuning fork
A. Increases
B. Decreases
C. Remains same
D. Increase or decreases depending on the material
5 Which of the following changes at an antinode in a stationary wave?
A. Density only
B. Pressure only
C. Both pressure and density
D. Neither pressure nor density
6 Si units of time period is
A. second
B. hertz
C. revolution
D. vibration/sec
7 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
8 If the length of second pendulum becomes four times then its time period will become
A. Four time
B. Two times
C. Six times
D. Eight times
9 Shock absorber of the car is an example of
A. resonance
B. forced oscillations
C. interference
D. damped oscillations
10 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

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