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 two waves of length 50 cm and 51 cm produced 12 beats per second, the velocity of sound is

Question # 2

Example of progressive wave is

Question # 3

In stationary waves

Question # 4

Example of vibratory motion is

Question # 5

The weight 'mg' of the bob is resolved into

Question # 6

When the bob of simple pendulum is at mean position, its K.E will be

Question # 7

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

Question # 8

Crests and troughs are formed in:

Question # 9

The portion of the water above its mean level forms a:

Question # 10

When a body is performing S.H.M., its acceleration is

Question # 11

Fluids can transmit:

Question # 12

The velocity of sound is greatest in

Question # 13

When two progressive waves of nearly same frequencies superimpose and give rise to beats, then

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 When a body is performing S.H.M., its acceleration is
A. inversely proportional to the displacement
B. directly proportional to the applied force
C. directly proportional to the amplitude
D. directly proportional to the displacement but in opposite direction
2 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
3 The process in which energy is dissipated from the oscillating system is known as
A. resonance
B. interference
C. diffraction
D. damping
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 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:
A. Stationary waves
B. Transverse waves
C. Both of these
D. None of these
6 Wave disturbances may also come in a concentrated bundle, like shock wave from an aeroplane flying at
A. subsonic speed
B. sonic speed
C. super sonic speed
D. any one of them
7 For production of beats the two sources must have
A. Different frequencies and same amplitude
B. Different frequencies
C. Different frequencies, same amplitude and same phase
D. Different frequencies and same phase
8 A wave, which transfer energy by moving away from the source of disturbance is called a
A. progressive wave
B. travelling wave
C. both of them
D. none of them
9 At a certain instant a stationary transverse wave is found to have maximum kinetic energy. The appearance of string of that instant is
A. Sinusoidal shape with amplitude A/3
B. Sinusoidal shape with amplitude A/2
C. Sinusoidal shape with amplitude A
D. Straight line
10 Transverse waves can be set up:
A. Solids
B. Liquids
C. Gases
D. All of them

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