ECAT Pre Engineering Physics Chapter 8 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 8 Waves

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 8 Waves

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Physics ECAT Pre Engineering Chapter 8 Waves

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Question # 1

Two sources of sound are said to be coherent if

Question # 2

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

Question # 3

If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be

Question # 4

The frequency of free vibrations is known as

Question # 5

Fluids can transmit:

Question # 6

SI unit of frequency is

Question # 7

For production of beats the two sources must have

Question # 8

Longitudinal waves are also called:

Question # 9

Which one of the following is an example of resonance

Question # 10

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

Question # 11

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 # 12

The principle of superposition states that

Question # 13

The time required to complete on vibration is called

Question # 14

The velocity of sound in air not effected by changes in

Question # 15

A stationary sound wave has frequency 165 Hz (speed of sound in air = 330 m/s) then distance between two consecutive nodes is

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 Which of the following medium/media can transmit both transverse and longitudinal waves:
A. Solids
B. Liquids
C. Gases
D. All of them
2 At 'resonance' the transfer of energy from deriving source to the oscillator is
A. maximum
B. minimum
C. zero
D. none of them
3 When two waves with same frequency and constant phase difference phase difference interfere
A. There is a gain of energy
B. There is a loss of energy
C. The energy is redistributed and the distribution changes with time
D. The energy is redistributed and the distribution remains constant with time
4 SI unit of frequency is
A. second
B. hertz
C. revolution
D. vibrations/sec
5 There is no net transfer of energy by particle of medium in
A. Longitudinal wave
B. Transverse wave
C. Progressive wave
D. Stationary wave
6 When two progressive waves of nearly same frequencies superimpose and give rise to beats, then
A. Frequency of beat changes with time
B. Frequency of beat changes with location of observer
C. All particles of medium vibrate simple harmonically with frequency equal to the difference between frequencies of component waves
D. Amplitude of vibration of particles at any point changes simple harmonically with frequency equal to difference between two component waves
7 The example of mechanical wave is
A. waves in ropes
B. waves on water surface
C. waves in air
D. all of them
8 The velocity of sound at same temperature is maximum in
A. H2
B. N2
C. O2
D. NH3
9 If a wave can be polarized, it must be
A. An electromagnetic wave
B. A longitudinal wave
C. A progressive wave
D. A transverse wave
10 Which one of the following elasticizes is possessed by fluids:
A. Young's elastic modulus (length)
B. Bulk elastic modulus (volume)
C. Modulus of rigidity (shape)
D. None of these

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