Question # 1

The expression for restoring force is

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F=ma

F=kx

F= -kx

Kx=ma

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 phase determines the

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displacement

amplitude

frequency

state of motion of vibrating body

The wave motion set up in any medium depends upon:

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Elasticity

Inertia

Density

All of these

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

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

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273°C

0°C

927°C

1027°C

The example of mechanical wave is

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waves in ropes

waves on water surface

waves in air

all of them

A physical system under going forced vibrations is known as

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Simple harmonic oscillator

Compound harmonic oscillator

Physical harmonic oscillator

driven harmonic oscillator

A body is executing free vibrations when it oscilates

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with the interference of an external force

without the interference of an external force

with the interference of an internal force

none of them

Shock absorber of the car is an example of

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resonance

forced oscillations

interference

damped oscillations

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

Energy is not carried by

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Transverse progressive waves

Longitudinal vibration

Stationary waves

Electromagnetic

If the time period a simple pendulum is 2 s, its frequency would be

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2 Hz

1.5 Hz

1.0 Hz

0.5 Hz

Energy is dissipated and consequently the energy mass system do not oscillate indefinitely because of

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very small energy

very large energy

frictional forces

acceleration due to gravity

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

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along the radius

along the tangent

away from the circle

none of them

Longitudinal waves are also called:

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Congressional waves

Transverse waves

Radio waves

None of them

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