Question # 1

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

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Kinetic energy

Potential eneger

Elastic potential energy

Geothermal energy

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

In Einstein's mass-energy equation c means speed of light. Its value is:

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3 x 10^-8 ms^-1

3 x 10⁸ms^-1

3 x 10⁹ms^-1

3 x 10¹⁸ms^-1

From following, which one is a renewable source of energy?

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Coal

Gas

Sunlight

Petrolum

What type of conversion is done candle burning?

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Chemical __ ;light

Chemical __ heat

Both a & b

None of above

Above of mass 50 kg is raised to a height of 3m. what is its P.E

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500 J

1000 J

1500 J

2000 J

Einstein's mass-energy equation relation is:

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E =1/2 mc²

E =mc²

E =m²c

E = 2 mc²

The ratio of useful output to input energy is called:

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Power

Energy

Efficiency

Horse power

The kinetic energy of the body of mass 1000 kg moving a speed of 20 ms^-1 will be:

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2 x 10² J

2 x 10³J

2 x 10⁵J

2 x 10⁸J

In a dam the water energy is called:

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Heat energy

Electrical energy

G.P.E

Mechanical enrgy

P.E is calculated by a formula :

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Mgh

mg

gh

Nil

1 KW (kilo Watt) is equal to:

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10² W

10³ W

10⁵ W

10⁶W

1 hp is equal to :

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747 W

746 W

748 W

1000 W

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

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