Question # 1

The S.I unit of power is:

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Newton

Watt

Joule

Coulomb

Fossils fuels are usually compound of:

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Carbon

Hydrogen

Carbon & Hydrogen

None of these

The ratio of useful output to input energy is called:

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Power

Energy

Efficiency

Horse power

The energy of a body during the motion is called:

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Potential energy

Kinetic energy

Elastic P.E.

Heat energy

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

1 MJ=

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10³ J

10⁶J

10⁷J

10^-3J

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

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Solid

Liquid

Gas

Plasma

P.E is calculated by a formula :

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Mgh

mg

gh

Nil

The product of force and displacement is called;

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Work

Efficiency

Power

Energy

Formula of Power:

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P = wt

P = w/t

P = t/w

P = w/t²

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

Fossil fuels are usually:

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Carbon di oxide

Hydrogen

Hydrocarbons

Carbon monoxide

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