Question # 1

Which one is non renewable source of energy.

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Hydro electric

Bio mass

Tides

Oil

Work is negative when angle between F and d is

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45^o

₀^o

90^o

180^o

The dimension of power is

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MLT-1

ML2T-2

ML2T2

ML2T-3

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 tides raise in the sea roughly

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Once a day

Twice a day

Three a day

Four time a day

The SI unit of work is

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Newton

Joule

Mol

Calorie

Original source of energy for biomass is

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Earth

Star

Moon

Sun

A body has P.E. = mgh, when it is at height 'h' from the ground. At the point at the distance 'x' below from the top its P.E. with

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mgh

mgx

mg(x-h)

None of these

Work is a

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Scalar quantity

Vector quantity

Basic quantity

None of these

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

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

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Increase

One watt

One erg

One joule

Biomas is a potential source of

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Renewable energy

Non renewable energy

Botha a and b

Tidal energy

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

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180^o

0^o

90^o

60^o

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

The SI unit of power is

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Joule

Newton

Watt

Kilowatt

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