Question # 1

Metals are good conductors of heat due to :

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Free electrons

Big size of molecules

Small size of molecules

None of these

In velocity the body become double , then centripetal force will be:

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Half

Three times greater

Double

Four times greater

The work is negative if the angle between force and displacement is:

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0°

45°

90°

180°

What is the effect of lubricicantion?

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Increase friction

No effect

Reduce friction

None

The height of geostationary satellites with respect to Earth is

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36,300 km

40,300 km

30,300 km

42,300 km

When a stress on a body crosses the limit, called the?

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Elastic limit

Plastic limit

Failure point

Breaking point

Moon is a _____________ satellite.

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Natural

Artificial

Not manmade

Nil

All divers need to wear seat belt because of effect of:

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Air resistance

Tensional

Push force

Gravitational

What of the following is a god radiator of heat?

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a Shinning silvered surface

a dull black surface

a white black surface

a shinning colored surface

The earth also completes its one revolution about its axis in.

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1 Hours

6 Hours

13 Hours

24 Hours

Resultant vector can be found by:

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θ=tan^-1 Fy/ Fx

θ=tan[Fy/ Fx ]

θ=tan^-1[ Fy/ Fj ]

None of these

Absolute zero is equal to

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0 K

273

-273 K

373 K

Displacement is a quantity.

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Scalar

Vector

Both a and b

None of these

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