Question # 1

The energy processes, we use are

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Efficient

Not efficient

Reversible

None of these

A typical rocket consumes fuel about

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40000 Kgs-1

30000 Kgs-1

20000 Kg s-1

10000 Kgs-1

The units of magnifying power of microscope or telescope are.

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Metre

m^-1

dioptre

No unit

Which material has maximum viscosity

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Glycerin

Plasma

Methanol

Water

Bio mass is converted into fuel by

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Evaporation

Fermentation

Reflection

Scattering

Critical angle is that angle of incident ofr which angle of refraction is.

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90 ^o

45 ^o

42 ^o

24 ^o

The speed of sound increases with the increase of in

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Pressure

Volume

Temperature

Density

The distance between the consecutive nodes is

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The efficiency of any heat engine can never be

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+ve

100%

-ve

None of these

Star moving towards the earth show

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Red shift

Blue shift

Green shift

Yellow shift

For a gas obeying Boyle's Law, if the pressure is doubled, the volume becomes.

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Double

Three fold

One half

Remains the same

The fringe spacing increases if we use.

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Yellow light

Green lgiht

Blue light

Red light

A vector is denoted by

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Light face

Bold face

Both a and b

None of these

Height of geo stationary orbit of the satellite above the earth is.

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300 km

250 km

400 km

None of these

If the temperature of a gas is constant then <1/2 mv2> of the molecules of gas will be.

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Constant

Zero

Increase

Decrease

The frictional force is

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Conservative force

Non conservative force

Electric force

Magnetic force

The molecules of an ideal gas exert

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Force on each other

No force on each other

Large force on each other

Pressure on each other

The dimensional of potential energy per unit volume are same as that of.

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Work

Pressure

Speed

Density

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