Question # 1

If a person is not moving when he lifts a load on his head work is:

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FS

FS Cos𝜽

FS Sin𝜽

0

In a dam the water energy is called:

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Heat energy

Electrical energy

G.P.E

Mechanical enrgy

Which one of the following converts light energy into electrical energy?

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Electric Bulb

Electric generator

Photocell

Electric cell

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

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

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

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45°

60°

90°

180°

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

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Parallel

Perpendicular

Anti parallel

Tangent

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

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Remain the same

Become double

Become four time

Become half

What type of conversion is done candle burning?

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Chemical __ ;light

Chemical __ heat

Both a & b

None of above

kgm²s^-2 = _________

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Newton

Joule

Watt

Coulomb

Which quantity is scalar?

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Force

Power

Velocity

Torque

The ratio of output to input is called:

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work

Efficiency

Force

All of above

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

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

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