Question # 1

Solar cell is are also known as:

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Electric cell

Photo Cell

Sun cells

Nuclear cells

kgm²s^-2 = _________

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Newton

Joule

Watt

Coulomb

The product of force and displacement is called;

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Work

Efficiency

Power

Energy

The S.I unit of efficiency is :

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J/s

Nm

watt

It has no unit

A crate is moved by pulling the rope attached to it. it moves 10 m on straight horizontal read by a force of 100 N. How much work will be done when the rope is making an angle of 30° with the road?

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5 Joules

86 Joules

707 Joules

866 Joules

if a body of a mass 'm' is moving with velocity 'v' then its K.E. is given by

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K.E. = 1/2 mv

K.E. = 1/2 mv2

K.E. = mv2

K.E. = 1/2 m2v

The energy present in our food is:

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Mechanical energy

Gravitational potential energy

Chemical energy

Nuclear energy

An ideal system gives output:

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50%

60%

80%

100%

The energy possessed by a body due to height is called:

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P.E

K.E

Both

None

When a hammer raised up its energy will be:

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Mechanical energy

Gravitational potential energy

Chemical energy

Nuclear energy

_____________ can neither be created nor be destroyed.

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Light

Force

Energy

Weight

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

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Parallel

Perpendicular

Anti parallel

Tangent

When a body is lifted through a height h, the work donw on it appears in the form of its.

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Kinetic energy

Potential energy

Elastic energy

Geothermal energy

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

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