ECAT Pre General Science Physics Chapter 8 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 8 Waves

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ECAT Pre General Science Physics Chapter 8 Waves

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Question # 1

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

Question # 2

Waves transport energy

Question # 3

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 # 4

Decibel is unit of

Question # 5

When a body moves to and fro motion, this type of motion is called

Question # 6

The restoring force always directed towards the

Question # 7

The speed of sound in a medium depends on

Question # 8

A weakly damped system has fairly

Question # 9

Acceleration of the mass at any instant is given by

Question # 10

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

Question # 11

Which of the following is not mechanical wave?

Question # 12

When half of the cycle of a body executing S.H.M is completed, then the phase of the vibration will be

Question # 13

transverse wave motion is possible in:

Question # 14

The vibrations of factory floor caused by the running of heavy machinery is an example of

Question # 15

The example of mechanical wave is

Question # 16

While describing the motion of a simple pendulum, the frictional effects are

Question # 17

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

Question # 18

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

Question # 19

The maximum displacement of a body on either side of its equilibrium position is called

Question # 20

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

Question # 21

The distance covered by the wave in one second is:

Question # 22

Which one is not produced by sound waves in air?

Question # 23

The weight 'mg' of the bob is resolved into

Question # 24

The velocity of sound in air not effected by changes in

Question # 25

The distance covered by the wave during one period is called its:

Question # 26

Example of progressive wave is

Question # 27

In compressional wave,the layer of medium having reduced pressure is called:

Question # 28

A simple pendulum consists of a

Question # 29

Shock absorber of the car is an example of

Question # 30

If a freely oscillating system is subjected to an external force, then

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 transverse wave motion is possible in:
A. Air
B. A mixture of NH3and O2
C. Strings
D. All of these
2 When an oscillatory motion repeats itself, then this type of motion is called
A. vibratory motion
B. constant motion
C. fixed motion
D. periodic motion
3 Which one of the following elasticizes is possessed by fluids:
A. Young's elastic modulus (length)
B. Bulk elastic modulus (volume)
C. Modulus of rigidity (shape)
D. None of these
4 Velocity of sound in a diatomic as is 300 m/sec. what is its rms velocity?
A. 400 m/sec
B. 40 m/sec
C. 430 m/sec
D. 300 m/sec
5 The waves in which the particles of the medium have displacement along the direction of propagation of waves are called
A. longitudinal waves
B. transverse waves
C. non-mechanical waves
D. none of them
6 What is frequency of radio waves transmitted by a station, if the wavelength of those waves is 300 m?
A. 1 MHz
B. 10 Hz
C. 1 GHz
D. 100000 Hz
7 Sound waves in air always
A. Longitudinal
B. Transverse
C. Stationary
D. Electromagnetic
8 The waves produced in a microwave oven have wavelength.
A. 12 mm
B. 12 cm
C. 12 m
D. 12 mm
9 Resonance occurs when one of the natural frequencies of vibration of the forced or driven harmonic oscillator
A. greater than the frequency of applied force
B. equal to the frequency of applied force
C. less than the frequency of applied force
D. all of them
10 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

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