Question # 1

What will be the effect on the speed of a Transerv wave in a string. If tension is made 4 times.

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Remains the same

Increase a times

Becomes double

Becomes 3 times

Which of the following medium can transmit both transverse and longitudinal waves.

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Solid

Gas

Liquid

Plasma

Air bubble in water shines because of

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Reflection

Refraction

Diffraction

Total internal reflection

Laser light is considered to be coherent because it consists of.

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Many wavelengths

Uncoordinated wavelengths

Coordinated waves of exactly the same wavelength

Divergent beams

Frequency less than 120 Hz are known as

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Infrasonic

Ultra sonics

Super sonics

Infrared

Which term best describes the nature of light from modern view point.

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Waves

Rays

Particles

Photons

Electromagnetic waves are produced by

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Charge at rest

Accelerated changes

Heating a conductor

Electroplating

If Young's experiment is performed in water. which of the following change will occur.

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Fringe width will increases

Fringe width will decreases

Fringe width will remain unchanged

No fringe will be seen

In a diffraction pattern, the width of any fringe

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Is directly proportional to slit width

Is inversely proportional to slit with

Has no dependence on slit width

Is zero

The energy transported by a wave is proportional to the square of the.

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Wavelength of the wave

Period of the wave

Amplitude of the wave

Frequency of the wave

Two tuning forks of frequencies 260 Hz and 257 Hz are sounded together the number of beats produced per seconds is.

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1

3

4

257

The note of the lowest frequency is called

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beat

Overtone

Fundamental note

Harmonic note

In the experiment of production of X rays the anti cathode should be bombarded with.

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A particles

Beta particles

Electrons

Protons

A point source of light is situated at large distance The nature of the wave front at the point will be.

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Cylindrical

Spherical

Plane

Ellipical

The quality of a note

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Decreases with loudness

Varies directly as its pitch

Varies inversely as its pitch

Depends upon the overtones

Huygen's principle is used to explain the

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Speed of light

Dispersion of light

Propagation of light

Reflection of light

The ripple tank is used to study various features of

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Wave phenomenon

Interferences

Doppler's effect

Reverberation

On which characteristics the loudness of sound pends upon.

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Pitch

Speed

Wavelength

Amplitude

The unit of intensity of sound waves is.

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W m-1

W m-2

N m-1

N m-2

What is the emission of light by a substance that has observed light or others electromagnetic radiations of a difference wavelength.

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Fluorescence

Illuminance

Luminance

Incandescence

Waves transfer

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Frequency

Velocity

Energy

Wavelength

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