Question # 1

A solar cell is also called:

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Photo cell

Generator

Battery

None

Einstein's mass-energy equation is

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E = mc

E = mc2

E = 2mc

E = m2c

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

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

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Electric Bulb

Electric generator

Photocell

Electric cell

The energy stored in dam is:

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Potential energy

Kinetic energy

Chemical enegy

Nuclear energy

Kinetic and potential energy are the kinds of energy:

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Chemical

Nuclear

Light

Mechanical

SI unit of work is:

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Joule

Coulomb

Ampere

Kelvin

Rate of doing work is called:

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Energy

Torque

Power

Moment

What will be the magnitude of work if a force of 25N pulls a stone through a distance of 5 m in its directions

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25 J

50 J

75 J

125 J

The S.I unit of efficiency is :

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J/s

Nm

watt

It has no unit

P.E is equal to:

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mgh

1/2 mv²

W x F

None of these

The kinetic energy of a body of mass 2 kg is 25 J. Its speed is:

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5 ms^-1

12.5 ms^-1

25 ms^-1

50 ms^-1

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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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