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

If the length of second pendulum becomes four times then its time period will become

Question # 2

For production of beats the two sources must have

Question # 3

A wave, which transfer energy by moving away from the source of disturbance is called a

Question # 4

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

Question # 5

The resonance will be sharp, if the amplitude decreases rapidly at a frequency

Question # 6

The ratio of velocity of sound in air at 4 atm pressure and that at 1 atm pressure would be

Question # 7

In the resonance condition, the amplitude of the oscillator becomes

Question # 8

Fidelity refers to

Question # 9

The expression of Hook's law is

Question # 10

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

Question # 11

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

Question # 12

A swing has

Question # 13

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

Question # 14

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 # 15

To hear a clear echo, the reflecting surface must be at a minimum distance of

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 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
A. rotatory motion
B. motion under gravity
C. angular motion
D. simple harmonic motion
2 The speed of sound in a medium depends on
A. The elastic property but not on the inertia property
B. The inertia property but not on the elastic property
C. The elastic property as well as the inertia property
D. Neither the elastic property nor the inertia property
3 In the production of beats by 2 waves of same amplitude and nearly same frequency, the maximum intensity to each of the constituent waves is
A. Same
B. 2 times
C. 4 times
D. 8 times
4 The expression for restoring force is
A. F=ma
B. F=kx
C. F= -kx
D. Kx=ma
5 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
6 Laplace formula is derived from
A. Isothermal change
B. Adiabatic change
C. Isobaric change
D. None of these
7 If we increase the length of a simple pendulum four times, its time period will become
A. 2 times
B. 3 times
C. 4 times
D. 6 times
8 In a resonance situation the amplitude of the motion may become extra ordinarily large, if
A. the driving force is large
B. the driving force is zero
C. the driving force may be feeble
D. all of them
9 SI unit of frequency is
A. second
B. hertz
C. revolution
D. vibrations/sec
10 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

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