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

If the displacement of a body executing S.H.M is plotted against time, then the curve is known as

Question # 2

The speed of sound in a medium depends on

Question # 3

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

Question # 4

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 # 5

A body is executing free vibrations when it oscilates

Question # 6

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

Question # 7

The weight 'mg' of the bob is resolved into

Question # 8

Of the following, the option ______ reminds of longitudinal waves.

Question # 9

Which of the following does not exhibit S.H.M?

Question # 10

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

Question # 11

Which one of the following is an example of resonance

Question # 12

The waves produced in a microwave oven have wavelength.

Question # 13

Smaller the damping, greater will be the

Question # 14

Such oscillations in which the amplitude decreases steadily with time, are called

Question # 15

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

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 The waves in which the particles of the medium are displaced in a direction perpendicular to the direction of propagation of waves are known as
A. longitudinal waves
B. transverse waves
C. non-mechanical waves
D. none of them
2 The distance covered by the wave in one second is:
A. Wave number
B. Wave length
C. Frequency
D. Wave speed
3 Acceleration of the mass at any instant is given by
A. a=k/m x
B. a= - m/k x
C. a = - k/m x
D. a=m/k x
4 The principle of superposition states that
A. The total displacement due to several waves is the sum of the displacement due to those waves acting individually
B. Two stationary waves superimpose to give two progressive waves
C. A diffraction pattern consists of many interference patterns superimposed on one another
D. Two progressive waves superimpose to give a stationary wave
5 The waves which propagate through the oscillations of material particles are known as:
A. Mechanical waves
B. Electromagnetic waves
C. Any of them
D. None of them
6 When sound waves travel from air to water which of these remains constant?
A. Velocity
B. Frequency
C. Wavelength
D. All the above
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 Energy is not carried by
A. Transverse progressive waves
B. Longitudinal vibration
C. Stationary waves
D. Electromagnetic
9 Time period of a simple pendulum depends upon the
A. length of the pendulum
B. acceleration due to gravity
C. none of them
D. both of them
10 SI unit of frequency is
A. second
B. hertz
C. revolution
D. vibrations/sec

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