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

As the bob of the pendulum moves to and fro which of the force is experienced by the bob

Question # 2

Which one of the following could be the frequency of ultraviolet radiation?

Question # 3

When a mass 'm' is pulled slowly through a distance 'xo' , the elastic potential energy of the spring would be

Question # 4

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 # 5

Two sources of sound are said to be coherent if

Question # 6

Which of the following is an example of a S.H.M?

Question # 7

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 # 8

The example of mechanical wave is

Question # 9

When a mass 'm' is pulled slowly, the spring stretches by an amount xo, then the work done will be

Question # 10

If the time period a simple pendulum is 2 s, its frequency would be

Question # 11

When an oscillatory motion repeats itself, then this type of motion is called

Question # 12

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

Question # 13

The expression of Hook's law is

Question # 14

Example of progressive wave is

Question # 15

The number of vibrating body at any instant from its equilibrium position is called

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ECAT Class Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 One complete round trip of the body about its mean position is called
A. displacement
B. vibration
C. a complete motion
D. an acceleration
2 Example of progressive wave is
A. transverse waves
B. longitudinal waves
C. both of them
D. none of them
3 If the external driving force is periodic with a period compareable to the natural period of the oscillator, then we get
A. diffraction
B. beat
C. interference
D. resonance
4 The vibratory or oscillatory motion of a body is
A. translatory motion
B. back and forth motion about its mean position
C. free all motion
D. circular motion
5 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
6 Sound waves in air always
A. Longitudinal
B. Transverse
C. Stationary
D. Electromagnetic
7 When half of the cycle of a body executing S.H.M is completed, then the phase of the vibration will be
A. 45°
B. 90°
C. 135°
D. 180°
8 The velocity of sound at same temperature is maximum in
A. H2
B. N2
C. O2
D. NH3
9 The ratio of velocity of sound in air at 4 atm pressure and that at 1 atm pressure would be
A. 1 : 2
B. 4 : 1
C. 1 : 4
D. 2 : 1
10 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

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