Question # 1

The fringe spacing increases if we use.

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Yellow light

Green lgiht

Blue light

Red light

Experimentation and practical verification was fist indroduced by

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The Muslim Scientists

The Greek philosopher

The European scientsts

None of these

The relation between linear and angular velocity is

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P.E. of a spring is stored in

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Spring

mass

Both of them

None of these

The efficiency of diesel engine is about

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25% to 30%

35% to 40%

40% to 50%

50% to 60%

the velocity of sound is maximum at 20 ^oC in

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Lead

Copper

Glass

Iron

The optical fibre is covered for protection by

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Glass jacket

Plastic jacket

Steel jacket

Diamond jacket

If the wave motion is 0.01 sec and wave speed is 100 ms-1 then frequency of wave is.

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0.5 Hz

1 Hz

10 Hz

100 Hz

The speed of sound in air would become double than ots speed at 10^oC at a temperature of.

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313 ^oC

586 ^oC

859^oC

899 ^oC

The device used to study the spectra from different sources of light is

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Telescope

Optical fibre

Spectrometer

Microscope

Turning of radio is example of.

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Mechanical resonance

Electrical resonance

Physical resonance

Biological resonance

The efficiency of any heat engine can never be

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+ve

100%

-ve

None of these

For working of heat engine, there must be

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A source

A sink

Ether of these

Both of them

Interplaner distance can be determined by

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Newton's rings

Bragg's law

Diffraction pattern

Interferometer

Physical quantiaties are divided into

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Two Categories

Six categories

Three categories

None of these

The angular acceleration a =

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1 KWh =

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3.6 x 10³K

3.6 x 10⁶K

3.6 x 10⁹J

3.6 x 10¹²J

The formula for the power is

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P= W/d

P=W/v

P=W/t

P=Wt

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