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

One complete round trip of the body about its mean position is called

Question # 2

Decibel is unit of

Question # 3

It two waves of amplitude 'a' produce a resultant wave of amplitude a, then the phase difference between them will be

Question # 4

When sound waves travel from air to water which of these remains constant?

Question # 5

The restoring force always directed towards the

Question # 6

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

Question # 7

Which of the following changes at an antinode in a stationary wave?

Question # 8

The waves which propagate out in the space due to oscillations of electric and magnetic fields are called:

Question # 9

Example of vibratory motion is

Question # 10

If F=0.04 N and X=4 cm then K=

Question # 11

The distance covered by the wave in one second is:

Question # 12

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

Question # 13

The damping depends upon the

Question # 14

Si units of time period is

Question # 15

transverse wave motion is possible in:

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 The characteristic of a body executing S.H.M is that its acceleration is
A. inversely proportional to displacement
B. directly proportional to displacement
C. independent of displacement
D. equal to zero
2 The bob of a simple pendulum is suspended by
A. string
B. heavy inextensible string
C. light extensible string
D. light inextensible string
3 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
4 The expression for restoring force is
A. F=ma
B. F=kx
C. F= -kx
D. Kx=ma
5 The expression of Hook's law is
A. F=ma
B. F=kx
C. F= -kx
D. -kx=ma
6 If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be
A. Increasing by a factor of 2
B. Decreasing by a factor of 2
C. Decreasing by a factor of 4
D. Unchanged
7 The velocity of sound at same temperature is maximum in
A. H2
B. N2
C. O2
D. NH3
8 A traveling wave has a shape of:
A. Square wave
B. Sine wave
C. Parabola
D. hyperbola
9 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
10 A body is executing free vibrations when it oscilates
A. with the interference of an external force
B. without the interference of an external force
C. with the interference of an internal force
D. none of them

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