Question # 1

The total energy of spring mass system is

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zero

changing with time

constant

none of them

SI unit of frequency is

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second

hertz

revolution

vibrations/sec

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

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increase

decreases

remains constant

none of them

Crests and troughs are formed in:

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Longitudinal waves

Transverse waves

Both of these

None of these

In the resonance condition, the amplitude of the oscillator becomes

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very large

very small

zero

any one of them

Through which character we can distinguish the light waves from sound waves

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Interference

Refraction

Polarization

Reflection

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

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

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frequency

amplitude

displacement

time period

The velocity of sound in air depends upon

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Density and elasticity of gas

Pressure

Wavelength

Amplitude and frequency of sound

Which of the following does not exhibit S.H.M?

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a plucked violin string

a mass attached to a spring

a train shunting between two terminals

a simple pendulum

Which waves are used in sonography?

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Microwaves

Infra red waved

Sound waves

Ultrasonic waves

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 time required to complete on vibration is called

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frequency

total time

time period

velocity

Which of the following medium/media can transmit both transverse and longitudinal waves:

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Solids

Liquids

Gases

All of them

If the length of second pendulum becomes four times then its time period will become

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Four time

Two times

Six times

Eight times

The waves which propagate out in the space due to oscillations of electric and magnetic fields are called:

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Mechanical waves

Electromagnetic waves

Matter waves

All of them

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