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

When a body is pulled away from its rest or equilibrium position and then released, the body oscillates due to

Question # 2

Laplace formula is derived from

Question # 3

The velocity of sound in air not effected by changes in

Question # 4

transverse wave motion is possible in:

Question # 5

It is possible to recognize a person by hearing his voice even if he is hidden behind a solid wall. This is due to the fact that his voice

Question # 6

Ultra-violet rays differ from X-rays in that they

Question # 7

A traveling wave has a shape of:

Question # 8

If we increase the length of a simple pendulum four times, its time period will become

Question # 9

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 # 10

The waves in which the particles of the medium have displacement along the direction of propagation of waves are called

Question # 11

A wave, which transfer energy by moving away from the source of disturbance is called a

Question # 12

If a wave can be polarized, it must be

Question # 13

SI unit of wave length is:

Question # 14

If the length of second pendulum becomes four times then its time period will become

Question # 15

If a simple pendulum is shifted from karachi to K-2 cliff, its time period

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ECAT Physics Chapter 8 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 Two sound waves of slightly different frequencies propagating in the same direction produce beats due to
A. Interference
B. Diffraction
C. Polarization
D. Refraction
4 What is frequency of radio waves transmitted by a station, if the wavelength of those waves is 300 m?
A. 1 MHz
B. 10 Hz
C. 1 GHz
D. 100000 Hz
5 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
6 Such oscillations in which the amplitude decreases steadily with time, are called
A. resonance
B. force oscillations
C. large oscillations
D. damped oscillations
7 The maximum displacement of a body on either side of its equilibrium position is called
A. frequency
B. amplitude
C. displacement
D. time period
8 For transmission of both transverse and longitudinal waves, we can use:
A. Solid
B. Gas
C. Plasma
D. None of these
9 Shock absorber of the car is an example of
A. resonance
B. forced oscillations
C. interference
D. damped oscillations
10 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

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