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

SI unit of wave length is:

Question # 2

Sound waves in air always

Question # 3

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

Question # 4

For production of beats the two sources must have

Question # 5

The velocity of sound in air depends upon

Question # 6

The principle of superposition states that

Question # 7

If the displacement of a body executing S.H.M is plotted against time, then the curve is known as

Question # 8

Fluids can transmit:

Question # 9

Through which character we can distinguish the light waves from sound waves

Question # 10

Which one of the following wave motions is transverse:

Question # 11

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

Question # 12

The wave form of S.H.M will be

Question # 13

Example of progressive wave is

Question # 14

A second's pendulum is a pendulum whose time period is

Question # 15

While describing the motion of a simple pendulum, the frictional effects are

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 The frequency of free vibrations is known as
A. free frequency
B. forced frequency
C. natural frequency
D. un-natural frequency
2 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
3 In the formula for finding the speed of waves in the spring, unit of m in SIn units is:
A. kg
B. kg-meter
C. kg/meter
D. Meter/kg
4 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
5 A string is stretched between two points and is plucked at right angles to its length, the vibration produced is:
A. Longitudinal wave
B. Transverse wave
C. No vibration at all
D. None of them
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 Fluids can transmit:
A. Transverse wave
B. Compressional wave
C. Both of them
D. None of them
8 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
9 The velocity of sound at same temperature is maximum in
A. H2
B. N2
C. O2
D. NH3
10 Transverse waves can be set up:
A. Solids
B. Liquids
C. Gases
D. All of them

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