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

Energy is dissipated and consequently the energy mass system do not oscillate indefinitely because of

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

In the resonance condition, the amplitude of the oscillator becomes

Question # 4

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

Question # 5

As the bob of the pendulum moves to and fro which of the force is experienced by the bob

Question # 6

The velocity of sound in air not effected by changes in

Question # 7

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

Question # 8

Which one of the following elasticizes is possessed by fluids:

Question # 9

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

Question # 10

For a body executing S. H. M, its

Question # 11

SI unit of wave length is:

Question # 12

Decibel is unit of

Question # 13

Which of the following changes at an antinode in a stationary wave?

Question # 14

A swing has

Question # 15

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

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 Energy is dissipated and consequently the energy mass system do not oscillate indefinitely because of
A. very small energy
B. very large energy
C. frictional forces
D. acceleration due to gravity
2 The waves in which the particles of the medium have displacement along the direction of propagation of waves are called
A. longitudinal waves
B. transverse waves
C. non-mechanical waves
D. none of them
3 The portion of the water above its mean level forms a:
A. Crest
B. Trough
C. Both A and B
D. None of these
4 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?
A. 100 ms-1
B. 200 ms-1
C. 450 ms-1
D. 900 ms-1
5 A second's pendulum is a pendulum whose time period is
A. 1 second
B. 2 seconds
C. 3 seconds
D. 4 seconds
6 Which of the following is the longitudinal waves?
A. Sound waves
B. Waves on plucked string
C. Water waves
D. Light waves
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 In stationary waves
A. Energy is uniformly distributed
B. Energy is minimum at nodes and maximum at antinodes
C. Energy is maximum at nodes and minimum at antidotes
D. Alternating maximum and minimum energy producing at nodes and antinodes
9 An object undergoes S.H.M has maximum speed when its displacement from the mean position is
A. maximum
B. zero
C. half of the maximum value
D. one third of the maximum value
10 Which one is not produced by sound waves in air?
A. Polarization
B. Diffraction
C. Refraction
D. Reflection

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