Question # 1

The efficiency of diesel engine is about

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25 % to 30%

35% to 40%

40% to 50%

50% to 60%

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

Food rich in proteins is:

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potato

grapes

vegetables

bread

The least distance of distinct vision for the normal eye is.

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15 cm

25 cm

125 cm

25 m

International Telecommunication satellite

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4,6,8 and 10 Hz

4,6,11 and 14 GHz

4,6,8 and 12 Hz

4,8,11 and 16 GHz

The terminal velocity can be obtained by using

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Newton's law

Stock's law

Guass's law

None of these

Information carrying capacity of optical fibre called.

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Capacity

Band width

Immunity

Ability

In stationary waves, the velocity of particle at the node is.

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Maximum

Infinite

Zero

Varible

Damping is the process in which energy

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Increases

Remains constant

Dissipates

None of these

When hot and cold water are mixed, the entropy.

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Decreases

Increases

Remain constant

Zero

In reversible process the entropy of system.

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Remain constant

Decrease

Increase

Becomes zero

The direction of angular acceleration is

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Along the axis of rotation

Perpendicular to the axis of rotation

Opposite to axis of rotation

None of these

If heat is added to a system, then its entropy will.

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Increases and positive

Decrease and positive

Increases but negative

Decreases but negative

The unit o pressure of gas is

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Nm^-2

Pascal

Atmosphere

All of these

The product of cross sectional area of a pipe and speed of fluid along the pipe is

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Zero

Maximum

Constant

Variable

Speed of sound in vacuum is

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280 ms-1

332 ms-1

333 ms-1

Zero ms-1

The centripetal force is always directed

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Away from the centre along the radius

Along the direction of motion

Opposite to the motion of the body

Towards the centre along the radius

An oil film on water surface shows colour due to.

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Diffraction

Interference

Polarization

Dispersion

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