Question # 1

In Einstein's mass-energy equation, c is the

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Speed of sound

Speed of light

Speed of electron

Speed of Earth

Above of mass 50 kg is raised to a height of 3m. what is its P.E

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500 J

1000 J

1500 J

2000 J

The energy stored in dam is:

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Potential energy

Kinetic energy

Chemical enegy

Nuclear energy

An ideal system gives output:

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50%

60%

80%

100%

Solar energy is a type of.

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Renewable

Non-renewable

Natural

None

The potential energy of a body of mass 'm' placed at a height 'h' above the surface of earth is equal to

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P.E. = mg

P.E. = mgh

P.E. = 3mgh

P.E. = 2mgh

The speed of light is equal to:

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3 x 10⁵ ms^-1

3 x 10⁸ms^-1

3 x 10⁹ms^-1

3 x 10²ms^-1

The S.I unit of efficiency is :

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J/s

Nm

watt

It has no unit

If the velocity of the body becomes double then its kinetic energy will:

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Remain the same

Become double

Become four times

Become half

Kinetic energy is possessed by a body by:

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Virtue of motion

Height

Rest

Nil

A solar cell is also called:

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Photo cell

Generator

Battery

None

In which of the following state molecules don not leave their position?

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Solid

Liquid

Gas

Plasma

Work is zero when "F" and "S" will be:

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Parallel

Perpendicular

Anti parallel

Tangent

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9th Class Physics Chapter 6 Work and Energy English Medium KPK Boards Online Mcqs MCQs With Answers

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