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 physical system under going forced vibrations is known as

Question # 2

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

Question # 3

The wave form of S.H.M will be

Question # 4

A body is executing free vibrations when it oscilates

Question # 5

If we increase the length of a simple pendulum four times, its time period will become

Question # 6

transverse wave motion is possible in:

Question # 7

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

Question # 8

The damping depends upon the

Question # 9

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

Question # 10

There is no net transfer of energy by particle of medium in

Question # 11

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

Question # 12

Acceleration of the mass at any instant is given by

Question # 13

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

Question # 14

If the mass of the simple pendulum becomes double, its time period

Question # 15

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 The maximum displacement of a body on either side of its equilibrium position is called
A. frequency
B. amplitude
C. displacement
D. time period
2 The temperature at which the speed of sound becomes double as was at 27°C is
A. 273°C
B. 0°C
C. 927°C
D. 1027°C
3 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
4 The restoring force always directed towards the
A. extreme position
B. mean position
C. both of them
D. none of them
5 The example of mechanical wave is
A. waves in ropes
B. waves on water surface
C. waves in air
D. all of them
6 Data transmitted along glass-fiber cables is in the form of pulses of monochromatic red light each of duration 2.5 ns. Which of the following is the best estimate of the number of wavelength in each pulse?
A. 103
B. 106
C. 109
D. 1012
7 If the length of a simple pendulum is 0.25 m its time period would be
A. 1.0 s
B. 2.0 s
C. 3.0 s
D. 4.0 s
8 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
9 Two sources of sound are said to be coherent if
A. The produce sounds of equal intensity
B. They produce sounds of equal frequency
C. They produce sound waves vibrating with the same phase
D. They produce sound waves with zero or constant phase difference all instant of time
10 Which of the following is an example of a S.H.M?
A. motion of a projectile
B. motion of a train along a circular path
C. motion of swing
D. electrons revolving sound the nucleus

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