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

For a body executing S. H. M, its

Question # 2

Which one of the following could be the frequency of ultraviolet radiation?

Question # 3

For production of beats the two sources must have

Question # 4

Velocity of sound in a diatomic as is 300 m/sec. what is its rms velocity?

Question # 5

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

Question # 6

Velocity of sound in vacuum (in m/s) is

Question # 7

Waves transport energy

Question # 8

The frequency of free vibrations is known as

Question # 9

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

Question # 10

The loudness and pitch of a sound note depends on

Question # 11

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

Question # 12

The bob of a simple pendulum is suspended by

Question # 13

The example of mechanical wave is

Question # 14

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

Question # 15

The instantaneous velocity of a body moving along a circle is directed

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Sr.# Question Answer
1 If a simple pendulum is shifted from karachi to K-2 cliff, its time period
A. remains the same
B. decreases
C. increases
D. none of them
2 If two waves of length 50 cm and 51 cm produced 12 beats per second, the velocity of sound is
A. 360 m/s
B. 306 m/s
C. 331 m/s
D. 340 ms
3 Decibel is unit of
A. Intensity of light
B. x-ray radiation capacity
C. sound loudness
D. Energy of radiation
4 For production of beats the two sources must have
A. Different frequencies and same amplitude
B. Different frequencies
C. Different frequencies, same amplitude and same phase
D. Different frequencies and same phase
5 To hear a clear echo, the reflecting surface must be at a minimum distance of
A. 10 m
B. 16.5 m
C. 33 m
D. 66 m
6 As the bob of the pendulum moves to and fro which of the force is experienced by the bob
A. its weight
B. tension in the string
C. viscous drag force by air
D. all of them
7 Which of the following does not exhibit S.H.M?
A. a plucked violin string
B. a mass attached to a spring
C. a train shunting between two terminals
D. a simple pendulum
8 Longitudinal waves are also called:
A. Congressional waves
B. Transverse waves
C. Radio waves
D. None of them
9 The time period of pendulums of different lengths would be
A. same
B. different
C. both of them
D. none of them
10 There is no net transfer of energy by particle of medium in
A. Longitudinal wave
B. Transverse wave
C. Progressive wave
D. Stationary wave

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