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

Decibel is unit of

Question # 2

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

Question # 3

SI unit of wave length is:

Question # 4

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

Question # 5

The temperature at which the speed of sound becomes double as was at 27°C is

Question # 6

A body is executing free vibrations when it oscilates

Question # 7

The waves which propagate out in space due to oscillation of electric and magnetic fields are known as

Question # 8

When an oscillatory motion repeats itself, then this type of motion is called

Question # 9

There is no net transfer of energy by particle of medium in

Question # 10

A weakly damped system has fairly

Question # 11

If the time period a simple pendulum is 2 s, its frequency would be

Question # 12

When a mass 'm' is pulled slowly, the spring stretches by an amount x0,then the average force would be

Question # 13

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

Question # 14

In stationary waves

Question # 15

Which waves are used in sonography?

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 Which one of the following could be the frequency of ultraviolet radiation?
A. 1.0 x 106Hz
B. 1.0 x 109Hz
C. 1.0 x 1012Hz
D. 1.0 x 1015Hz
2 The weight 'mg' of the bob is resolved into
A. one component
B. two components
C. three components
D. four components
3 When a wave is travels from one place to another, it transfers:
A. Matter
B. Energy
C. Momentum
D. Both B and C
4 If the time period a simple pendulum is 2 s, its frequency would be
A. 2 Hz
B. 1.5 Hz
C. 1.0 Hz
D. 0.5 Hz
5 A traveling wave has a shape of:
A. Square wave
B. Sine wave
C. Parabola
D. hyperbola
6 When the bob of simple pendulum is at extreme position, its K.E. will be
A. maximum
B. minimum
C. zero
D. all of them
7 The speed of sound in a medium depends on
A. The elastic property but not on the inertia property
B. The inertia property but not on the elastic property
C. The elastic property as well as the inertia property
D. Neither the elastic property nor the inertia property
8 In the resonance condition, the amplitude of the oscillator becomes
A. very large
B. very small
C. zero
D. any one of them
9 If a freely oscillating system is subjected to an external force, then
A. free vibrations will take place
B. the body will move with its natural frequency
C. forced vibrations will take place
D. none of them
10 The frequency of free vibrations is known as
A. free frequency
B. forced frequency
C. natural frequency
D. un-natural frequency

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