Question # 1

What gas behaves as glass or polythene to radiation:

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Nitrogen

Hydrogen

Carbon di oxide

Methane

The machine which use unequal masses to find the value of "g" is ________

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Free fall apparatus

Atwood machine

Pulley

None

The altitude of geostationary orbits in which communication satellites are launched above the surface of the earth is;

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850 km

1000 km

6400 km

42300 km

Which law of motion is called law of inertia:

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first law of motion

Second law of motion

Third law of motion

Law of conversation of momentum

The gravitational field exist _________ the earth.

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One direction

Upward

All aorund

Downward

Heat reflected form the body depends upon :

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Colour and form

Form and speed

Color and speed

None

Convection of heat is the process of heat transfer due to the

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Random motion of molecules

Downward movement of molecules

Upward movement of molecules

Free movement of molecules

The changing of a liquid into vapours from the surface of the liquid without heating:

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Cooling

Vaporization

Evaporation

Sublimation

Anything kept in thermos :

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In temperature remain constant

Its temperature decrease

Its temperature increase

None of these

There are ______ modes of transfer of heat:

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1

2

3

4

The energy of a body during the motion is called:

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Potential energy

Kinetic energy

Elastic P.E.

Heat energy

In screw gauge if zero of circular scale is behind the index line is called error.

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Positive

Zero

Negative

None of these

When a force of 4 Newton is applied on a body of mass 2 kg, the acceleration produced in it will be:

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2 ms^-2

4 ms^-2

8 ms^-2

6 ms^-2

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