Question # 1

A solar cell is also called:

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Photo cell

Generator

Battery

None

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

When a body is lifted through a height the work done on its appears in the form of its:

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Kinetic energy

Potential energy

Elastic potential energy

Geothermal energy

In falling object potential energy is covered to:

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K.E

Force

P.E

Nil

One Megawatt is equal to :

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1 × 106 w

1 × 102 kw

1015 w

Nil

In Einstin's mass energy equation, c is the :

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Speed of sound

Speed of light

Speed if volume

None of these

The work done in lifting a brick of mass 2 kg through a height of 5 m above ground will be:

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2.5 J

10 J

50 J

100 J

The ability of body to do work is called:

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Power

Energy

Work

Efficiency

When a hammer raised up its energy will be:

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Mechanical energy

Gravitational potential energy

Chemical energy

Nuclear energy

If a force F makes an angle θ with the direction of motion of the force, then the formula for the work done will be:

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W = FS

W = FS cosθ

W = FS sinθ

W = FS tanθ

The work done will be zero when the angle between the force and the displacement is:

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45°

60°

90°

180°

Energy cannot be destroyed however it can be converted into some other forms. This is known as:

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Law of heat exchange

Law of conservation of energy

Law of conservation of momentum

None of these

If a body does work at the rate of 1 Js^-1then its power will be:

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KW

1 MW

1 W

None of these

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Physics 9th Class English Medium Unit 6 Online Test MCQs With Answers

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