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

In the formula for finding the speed of waves in the spring, unit of m in SIn units is:

Question # 2

Longitudinal waves are also called:

Question # 3

Which waves are used in sonography?

Question # 4

The wave motion set up in any medium depends upon:

Question # 5

The weight 'mg' of the bob is resolved into

Question # 6

It is possible to recognize a person by hearing his voice even if he is hidden behind a solid wall. This is due to the fact that his voice

Question # 7

At a certain instant a stationary transverse wave is found to have maximum kinetic energy. The appearance of string of that instant is

Question # 8

The bob of a simple pendulum is suspended by

Question # 9

When a wave is travels from one place to another, it transfers:

Question # 10

The distance covered by the wave during one period is called its:

Question # 11

The natural frequency of a pendulum which is vibrating freely, depends upon its

Question # 12

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

Question # 13

In stationary waves

Question # 14

If the length of a simple pendulum is 0.25 m its time period would be

Question # 15

SI unit of wave length is:

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 In the resonance condition, the amplitude of the oscillator becomes
A. very large
B. very small
C. zero
D. any one of them
2 Which of the following changes at an antinode in a stationary wave?
A. Density only
B. Pressure only
C. Both pressure and density
D. Neither pressure nor density
3 When sound waves travel from air to water which of these remains constant?
A. Velocity
B. Frequency
C. Wavelength
D. All the above
4 The velocity of sound is greatest in
A. Water
B. Air
C. Vacuum
D. Metal
5 A weakly damped system has fairly
A. sharp resonance curve
B. flat resonance curve
C. both of them
D. none of them
6 When a mass 'm' is pulled slowly through a distance 'xo' , the elastic potential energy of the spring would be
A. P.E=Kx2o
B. P.E= 1/2kxo
C. P.E=1/2Kx2o
D. P.E=Kx2o
7 Such oscillations in which the amplitude decreases steadily with time, are called
A. resonance
B. force oscillations
C. large oscillations
D. damped oscillations
8 The velocity of sound at same temperature is maximum in
A. H2
B. N2
C. O2
D. NH3
9 The damping depends upon the
A. amplitude
B. sharpness
C. both of them
D. none of them
10 Fidelity refers to
A. Reproduction of original sound
B. Reproduction of original image
C. Reproduction of music
D. Reproduction of a CD from original copy

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