Question # 1

The distance covered by the wave during one period is called its:

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Wave number

Frequency

Wavelength

Time period

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

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Energy, momentum and mass

Energy

Energy and mass

Energy and linear momentum

Si units of time period is

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second

hertz

revolution

vibration/sec

The expression for restoring force is

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F=ma

F=kx

F= -kx

Kx=ma

What is frequency of radio waves transmitted by a station, if the wavelength of those waves is 300 m?

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1 MHz

10 Hz

1 GHz

100000 Hz

Mechanical waves on the surface of a liquid are

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Transverse

Longitudinal

Torsional

both transverse and longitudinal

Laplace formula is derived from

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Isothermal change

Adiabatic change

Isobaric change

None of these

Time period of simple pendulum is independent of

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length

mass

acceleration due to gravity

none of them

The time required to complete on vibration is called

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frequency

total time

time period

velocity

The waves produced in a microwave oven have wavelength.

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12 mm

12 cm

12 m

12 mm

In the production of beats by 2 waves of same amplitude and nearly same frequency, the maximum intensity to each of the constituent waves is

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Same

2 times

4 times

8 times

The vibratory motion of a body whose magnitude of acceleration is directly proportional to the magnitude of its displacement and is always directed towards the equilibrium position is called

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rotatory motion

motion under gravity

angular motion

simple harmonic motion

Which of the following is not mechanical wave?

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Sound wave

Light wave

wave produced in spring

None of them

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

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remains the same

decreases

increases

none of them

The frequency of free vibrations is known as

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free frequency

forced frequency

natural frequency

un-natural frequency

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

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