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

A string is stretched between two points and is plucked at right angles to its length, the vibration produced is:

Question # 2

Angular frequency 'w' is basically a characteristics of

Question # 3

Which one is not produced by sound waves in air?

Question # 4

Shock absorber of the car is an example of

Question # 5

Velocity of sound in a diatomic as is 300 m/sec. what is its rms velocity?

Question # 6

SI unit of frequency is

Question # 7

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

Question # 8

SI unit of wave length is:

Question # 9

Si units of time period is

Question # 10

The vibratory motion of a body whose magnitude of acceleration is directly proportional to the magnitude of its displacement and is always directed towards the equilibrium position is called

Question # 11

Crests and troughs are formed in:

Question # 12

The waves which propagate out in space due to oscillation of electric and magnetic fields are known as

Question # 13

Which of the following is not mechanical wave?

Question # 14

The bob of a simple pendulum is suspended by

Question # 15

The waves which propagate through the oscillations of material particles are known as:

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 The expression for restoring force is
A. F=ma
B. F=kx
C. F= -kx
D. Kx=ma
2 Transverse waves can be set up:
A. Solids
B. Liquids
C. Gases
D. All of them
3 SI unit of wave length is:
A. Kilometer
B. Metre
C. Centimetre
D. Hertz
4 When a body moves to and fro motion, this type of motion is called
A. translatory motion
B. circular motion
C. oscillatory motion
D. all of them
5 SI unit of frequency is
A. second
B. hertz
C. revolution
D. vibrations/sec
6 The waves moving from a sitar to a listener in air are
A. Longitudinal progressive
B. Longitudinal stationary
C. Transverse progressive
D. Transverse stationary
7 A second's pendulum is a pendulum whose time period is
A. 1 second
B. 2 seconds
C. 3 seconds
D. 4 seconds
8 The principle of superposition states that
A. The total displacement due to several waves is the sum of the displacement due to those waves acting individually
B. Two stationary waves superimpose to give two progressive waves
C. A diffraction pattern consists of many interference patterns superimposed on one another
D. Two progressive waves superimpose to give a stationary wave
9 The wave motion set up in any medium depends upon:
A. Elasticity
B. Inertia
C. Density
D. All of these
10 Ultra-violet rays differ from X-rays in that they
A. Cannot be diffracted
B. Cannot be polarized
C. Have a lower frequency
D. Are deviated when they pass through a magnetic field

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