Question # 1

The transfer of heat by vibrating molecules in solids :

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Conduciton

Radiation

Convection

None

The ability of a body to do work is known as

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power

energy

kinetic energy

potential energy

For balancing the beam balance, pointer must be at.

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Extreme position

Zero

The right side

The left side

Amount of substance in terms of numbers is measured in.

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gram

Kilogram

Newton

Mole

If heat Q flows in time 't' through some metal then rate of flow of heat is defined as

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Flow of heat = 2Qt

Flow of heat = Q/t

Flow of heat = t/Q

Flow of heat = Qt

The tendency of doing work is called :

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Time

Energy

Force

Area

The device that is used to measure the temperature of a body called

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Thermometer

Acidimeter

Barometer

Clock timer

To find x component of force 'F' we use formul:

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F Sin 𝜽

F Cos 𝜽

F tan 𝜽

F/F1

Earth's gravitational force of attraction vanishes at

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6400 km

Infinity

42300 km

1000 km

Which of the following is a vector quantity?

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Distance

Power

Speed

Displacement

A car starts from rest. It acquires a speed of 25 ms^-1after 20 s. The distance moved by the car during this time is

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31.25 m

250 m

5000 m

500 m

The mass of a body

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Decreases when accelerated

Increases when accelerated

Decreases when moving with high velocity

None of the above

The kinetic energy of a body of mass 2 kg is 25 J. Its speed is:

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5 ms^-1

12.5 ms^-1

25 ms^-1

50 ms^-1

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