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 solids, only following type/s of wave can travel:

Question # 2

The restoring force always directed towards the

Question # 3

It two waves of amplitude 'a' produce a resultant wave of amplitude a, then the phase difference between them will be

Question # 4

The time period of pendulums of different lengths would be

Question # 5

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

Question # 6

The waves moving from a sitar to a listener in air are

Question # 7

At 'resonance' the transfer of energy from deriving source to the oscillator is

Question # 8

The ratio of velocity of sound in air at 4 atm pressure and that at 1 atm pressure would be

Question # 9

What is frequency of radio waves transmitted by a station, if the wavelength of those waves is 300 m?

Question # 10

Which of the following is not mechanical wave?

Question # 11

The velocity of sound in air not effected by changes in

Question # 12

Sound waves in air always

Question # 13

Shock absorber of the car is an example of

Question # 14

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 # 15

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

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 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
2 A second's pendulum is a pendulum whose time period is
A. 1 second
B. 2 seconds
C. 3 seconds
D. 4 seconds
3 The force which opposes the applied force producing the displacement in the spring is called
A. restoring force
B. periodic force
C. centripetal force
D. resistive force
4 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
5 The example of mechanical wave is
A. waves in ropes
B. waves on water surface
C. waves in air
D. all of them
6 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
7 Velocity of sound in a diatomic as is 300 m/sec. what is its rms velocity?
A. 400 m/sec
B. 40 m/sec
C. 430 m/sec
D. 300 m/sec
8 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
9 A heavily damped system has a fairly
A. sharp resonance curve
B. flat resonance curve
C. both of them
D. none of them
10 Si units of time period is
A. second
B. hertz
C. revolution
D. vibration/sec

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