Question # 1

_______ is bio fuel

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Water

Petrol

Ethanol

Oil

Original source of energy for biomass is

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Earth

Star

Moon

Sun

By increasing the amount of stretch in spring the force exerted will

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Increase

One watt

One erg

One joule

Salter's duck was invented by

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Newton

Einstein

Prof Salter

Maxwell

When distance is plotted against the force, it is taken along

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x-axis

y-axis

z-axis

None of these

Watt -m2 is the unit of

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Energy

Intensity

Power

Work

The unit of solar light inversely is

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Watt

kW m-2

Watt m-2

1 m2

The work done will be maximum when angle between F and d.

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180^o

0^o

90^o

60^o

A body of mass 2 kg moving with velocity of 4 ms-1 has K.E. equal to.

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16 J

8 J

32 J

2 J

The commercial unit of electric energy is

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Kilo watt hour

watt

Watt hour

Kilo Watt

The frictional force is

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Conservative force

Non conservative force

Electric force

Magnetic force

1 KWh =

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3.6 x 10³K

3.6 x 10⁶K

3.6 x 10⁹J

3.6 x 10¹²J

The dimensions of work are.

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[MLT-1]

[MLT-2]

[ML2T-2]

[MLT]

The work done in gravitational field

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Depend upon the path

Does not depend upon the path

(+)ve

Zero

The power needed to lift a mass of 5000 g to height of 1 m in 2 secnd is

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2.45 watt

24.5 watt

245 watt

2.45 watt

The K.E. of bullet of mass 500 gm moving at a speed of 200 ms-1

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250 J

125 J

2500 J

10,000 J

Two quantities involved in work are

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Force and speed

Force and velocity

Force and displacement

Force and acceleration

Hot igneous rocks, usually in molten or partly molten state are found in the depth of

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5 km

10 km

15 km

20 km

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