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

The vibratory or oscillatory motion of a body is

Question # 2

Progressive waves of frequency 300 Hz are superimposed in produced a system of stationary waves in which adjacent nodes are 1.5 m apart. What is the speed of the progressive waves?

Question # 3

The vibrations of factory floor caused by the running of heavy machinery is an example of

Question # 4

In the same medium, velocity of the wave:

Question # 5

Mechanical waves on the surface of a liquid are

Question # 6

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

Question # 7

Wave disturbances may also come in a concentrated bundle, like shock wave from an aeroplane flying at

Question # 8

The wave motion set up in any medium depends upon:

Question # 9

When the particles of the medium vibrate about their mean position, along the direction of the motion of waves, then the waves are called:

Question # 10

In stationary waves

Question # 11

The example of mechanical wave is

Question # 12

In case of mechanical waves, we study the motion of

Question # 13

The velocity of sound at same temperature is maximum in

Question # 14

The weight 'mg' of the bob is resolved into

Question # 15

Such oscillations in which the amplitude decreases steadily with time, are called

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 The distance covered by the wave in one second is:
A. Wave number
B. Wave length
C. Frequency
D. Wave speed
2 The instantaneous velocity of a body moving along a circle is directed
A. along the radius
B. along the tangent
C. away from the circle
D. none of them
3 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°
4 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
5 In case of mechanical waves, we study the motion of
A. a single particle
B. collection of particle
C. any one of them
D. none of them
6 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
7 In the same medium, velocity of the wave:
A. Goes on increasing
B. Remains constant
C. Goes on decreasing
D. None of these
8 The portion of the water above its mean level forms a:
A. Crest
B. Trough
C. Both A and B
D. None of these
9 The distance covered by the wave during one period is called its:
A. Wave number
B. Frequency
C. Wavelength
D. Time period
10 SI unit of frequency is
A. second
B. hertz
C. revolution
D. vibrations/sec

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