Question # 1

If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be

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Increasing by a factor of 2

Decreasing by a factor of 2

Decreasing by a factor of 4

Unchanged

The expression of Hook's law is

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F=ma

F=kx

F= -kx

-kx=ma

Angular frequency 'w' is basically a characteristics of

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linear motion

circular motion

both of them

none of them

The loudness and pitch of a sound note depends on

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Intensity and velocity

Frequency and velocity

Intensity and frequency

Frequency and number of harmonic

A weakly damped system has fairly

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sharp resonance curve

flat resonance curve

both of them

none of them

Time period of simple pendulum is independent of

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length

mass

acceleration due to gravity

none of them

Laplace formula is derived from

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Isothermal change

Adiabatic change

Isobaric change

None of these

Energy is not carried by

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Transverse progressive waves

Longitudinal vibration

Stationary waves

Electromagnetic

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

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

At 'resonance' the transfer of energy from deriving source to the oscillator is

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maximum

minimum

zero

none of them

The restoring force always directed towards the

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extreme position

mean position

both of them

none of them

Which one of the following wave motions is transverse:

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Wave motion produced in water when a piece of stone is thrown into it

Pulling of weight hanging vertically with a spiral spring

Both of these

None of these

A traveling wave has a shape of:

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Square wave

Sine wave

Parabola

hyperbola

For production of beats the two sources must have

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Different frequencies and same amplitude

Different frequencies

Different frequencies, same amplitude and same phase

Different frequencies and same phase

Which one is not produced by sound waves in air?

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Polarization

Diffraction

Refraction

Reflection

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