Question # 1

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

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inversely proportional to displacement

directly proportional to displacement

independent of displacement

equal to zero

The phase determines the

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displacement

amplitude

frequency

state of motion of vibrating body

A stationary sound wave has frequency 165 Hz (speed of sound in air = 330 m/s) then distance between two consecutive nodes is

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2 m

1 m

0.5 m

4 m

An object undergoes S.H.M has maximum acceleration when its displacement form the means position

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maximum

zero

half of the maximum value

one third of the maximum value

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

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Has a definite pitch

Has a definite quality

Has a definite capacity

Can penetrate the wall

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

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Longitudinal wave

Transverse wave

Progressive wave

Stationary wave

Which type of wave can be set up in solids

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longitudinal waves

transverse waves

both of them

none of them

In the same medium, velocity of the wave:

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Goes on increasing

Remains constant

Goes on decreasing

None of these

The vibratory or oscillatory motion of a body is

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translatory motion

back and forth motion about its mean position

free all motion

circular motion

When a mass 'm' is pulled slowly through a distance 'x_o' , the elastic potential energy of the spring would be

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P.E=Kx²_o

P.E= 1/2kx_o

P.E=1/2Kx²_o

P.E=Kx²_o

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

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Cannot be diffracted

Cannot be polarized

Have a lower frequency

Are deviated when they pass through a magnetic field

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

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W=Kx_o

W=1/2Kx_o

W=1/2Kx²_o

W=4Kx_o

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

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applied force

momentum

restoring force

none of them

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

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longitudinal waves

transverse waves

non-mechanical waves

none of them

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

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Sinusoidal shape with amplitude A/3

Sinusoidal shape with amplitude A/2

Sinusoidal shape with amplitude A

Straight line

The total energy of spring mass system is

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zero

changing with time

constant

none of them

Crests and troughs are formed in:

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Longitudinal waves

Transverse waves

Both of these

None of these

The velocity of sound in air not effected by changes in

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Moisture contents in air

Temperature of air

The atmosphere pressure

The composition of air

Longitudinal waves are also called:

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Congressional waves

Transverse waves

Radio waves

None of them

The time required to complete on vibration is called

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frequency

total time

time period

velocity

Example of vibratory motion is

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mass suspended from a spring

a bob of simple pendulum

mass attached to a spring placed

all of them

Smaller the damping, the resonance will be

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more flat

more sharp

both of them

none of them

Two sound waves of slightly different frequencies propagating in the same direction produce beats due to

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Interference

Diffraction

Polarization

Refraction

The process in which energy is dissipated from the oscillating system is known as

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resonance

interference

diffraction

damping

It two waves of amplitude 'a' produce a resultant wave of amplitude a, then the phase difference between them will be

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60°

90°

120°

180°

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

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progressive wave

travelling wave

both of them

none of them

Fluids can transmit:

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Transverse wave

Compressional wave

Both of them

None of them

The principle of superposition states that

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The total displacement due to several waves is the sum of the displacement due to those waves acting individually

Two stationary waves superimpose to give two progressive waves

A diffraction pattern consists of many interference patterns superimposed on one another

Two progressive waves superimpose to give a stationary wave

Two sources of sound are said to be coherent if

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The produce sounds of equal intensity

They produce sounds of equal frequency

They produce sound waves vibrating with the same phase

They produce sound waves with zero or constant phase difference all instant of time

Time period of a simple pendulum depends upon the

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length of the pendulum

acceleration due to gravity

none of them

both of them

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

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Frequency of beat changes with time

Frequency of beat changes with location of observer

All particles of medium vibrate simple harmonically with frequency equal to the difference between frequencies of component waves

Amplitude of vibration of particles at any point changes simple harmonically with frequency equal to difference between two component waves

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