Question # 1

The process of confining the beam of light to vibrate in one plane is called.

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Interference

Diffraction

Polarization

Total internal refraction

The efficiency of a Carnot Heat Engine is 100% if temperature of sink T2 is.

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0 ^oC

0 K

0 ^oF

100 K

Usually the x-axis is taken as

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Vertical axis

Horizontal axis

+ve axis

-ve axis

Work is a

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Scalar quantity

Vector quantity

Basic quantity

None of these

Frequency range of hearing of cats is.

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20-20000 Hz

10- 10000 Hz

60-20000 Hz

60-70000 Hz

A ray of light is a line

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Parallel to wave front

Normal to wave front

Anti-parallel to wave

Any one of these

The lower reading of blood pressure is called.

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Systolic pressure

Diastolic pressure

Normal pressure

Non normal pressure

Oil film floating on water exhibits colours due to

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Interference

Diffraction

Polarization

All of these

For maximum range the angle of projection must be

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30^o

45^o

60^o

90^o

The diver spin faster when moment of inertia becomes.

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smaller

Greater

Constant

Equal

Size of the molecules is much smaller as compared to the

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Mass of the molecules

Distance between the molecules

Density of the molecules

Volume of the molecules

According to Hygen's principle, each point on a wave front acts as a source of.

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Secondary wavelet

New wave front

Sound

Primary wavelet

More details of an object can be seen with a microscope by using

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Green light

Red light

Yellow light

Blue light

How many orbiting satellites from the Global positing system.

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3

12

24

22

The speed of stars and galaxies can be calculated by

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Compton effect

Stefan's law

Doppler's effect

Pascal's law

Pi radian is equal to.

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0^o

90^o

180^o

57.3^o

The maximum velocity necessary to put a satellite into orbit is

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7.1 kms-1

7.3 kms-1

7.9 kms-1

8,9 kms-1

Original source of energy for biomass is

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Earth

Star

Moon

Sun

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