ECAT Pre General Science Physics Chapter 8 Waves

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  • Chapter NameCh 8 - Waves

ECAT Pre General Science Physics Chapter 8 Waves

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ECAT Pre General Science Physics Chapter 8 Waves

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Question # 1

A traveling wave has a shape of:

Question # 2

SI unit of wave length is:

Question # 3

The phase determines the

Question # 4

The expression of Hook's law is

Question # 5

A body is executing free vibrations when it oscilates

Question # 6

The vibrations of factory floor caused by the running of heavy machinery is an example of

Question # 7

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

Question # 8

Which waves are used in sonography?

Question # 9

The characteristic of a body executing S.H.M is that its acceleration is

Question # 10

As the bob of the pendulum moves to and fro which of the force is experienced by the bob

Question # 11

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

Question # 12

While describing the motion of a simple pendulum, the frictional effects are

Question # 13

When a mass 'm' is pulled slowly, the spring stretches by an amount xo, then the work done will be

Question # 14

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

Question # 15

Which of the following is an example of a S.H.M?

Question # 16

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 # 17

With the propagation of a longitudinal wave through a material medium, the quantities transmitted in the propagation direction are

Question # 18

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 # 19

The maximum displacement of a body on either side of its equilibrium position is called

Question # 20

A swing has

Question # 21

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

Question # 22

Example of progressive wave is

Question # 23

When half of the cycle of a body executing S.H.M is completed, then the phase of the vibration will be

Question # 24

The wave motion set up in any medium depends upon:

Question # 25

When the particles of the medium vibrate about their mean position, along the direction of the motion of waves, then the waves are called:

Question # 26

There is no net transfer of energy by particle of medium in

Question # 27

When two progressive waves of nearly same frequencies superimpose and give rise to beats, then

Question # 28

If the mass of the simple pendulum becomes double, its time period

Question # 29

The expression for restoring force is

Question # 30

Angular frequency 'w' is basically a characteristics of

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