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

Data transmitted along glass-fiber cables is in the form of pulses of monochromatic red light each of duration 2.5 ns. Which of the following is the best estimate of the number of wavelength in each pulse?

Question # 2

The time period of pendulums of different lengths would be

Question # 3

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 # 4

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

Question # 5

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

Question # 6

When two waves with same frequency and constant phase difference phase difference interfere

Question # 7

Which of the following is not mechanical wave?

Question # 8

The bob of a simple pendulum is suspended by

Question # 9

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

Question # 10

Longitudinal waves are also called:

Question # 11

The portion of the water above its mean level forms a:

Question # 12

Example of progressive wave is

Question # 13

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

Question # 14

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

Question # 15

In the same medium, velocity of the wave:

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 Associated with the motion of a driven harmonic oscillator, there is a very striking phenomenon, know as
A. waves
B. beat
C. interference
D. resonance
2 Example of progressive wave is
A. transverse waves
B. longitudinal waves
C. both of them
D. none of them
3 The waves produced in a microwave oven have frequency
A. 2450 Hz
B. 2450 K Hz
C. 2450 M Hz
D. 2450 G Hz
4 The weight 'mg' of the bob is resolved into
A. one component
B. two components
C. three components
D. four components
5 Energy is not carried by
A. Transverse progressive waves
B. Longitudinal vibration
C. Stationary waves
D. Electromagnetic
6 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
7 The bob of a simple pendulum is suspended by
A. string
B. heavy inextensible string
C. light extensible string
D. light inextensible string
8 If we increase the length of a simple pendulum four times, its time period will become
A. 2 times
B. 3 times
C. 4 times
D. 6 times
9 When the particles of the medium vibrate about their mean position, along the direction of the motion of waves, then the waves are called:
A. Longitudinal waves
B. Transverse waves
C. Water waves
D. Complex waves
10 A string is stretched between two points and is plucked at right angles to its length, the vibration produced is:
A. Longitudinal wave
B. Transverse wave
C. No vibration at all
D. None of them

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