Question # 1

The frictional force is

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Conservative force

Non conservative force

Electric force

Magnetic force

Which one is non renewable source of energy.

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Hydro electric

Bio mass

Tides

Oil

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 1.0 Kg dropped from the top of a tower of highest 50 m, what will be its K.E. 10 m below the top

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400 J

490 J

49 J

98 J

Two quantities involved in work are

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Force and speed

Force and velocity

Force and displacement

Force and acceleration

A layer of rock holding water that allows water to percolate through it with pressure is called.

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Geyeser

Aquifer

Stem vent

Hot spring

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

Salter's duck was invented by

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Newton

Einstein

Prof Salter

Maxwell

The formula for the power is

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P= W/d

P=W/v

P=W/t

P=Wt

If velocity 'v' of an object is double, then K.E. because.

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Remain same

Sixteen times

Double

Four times

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

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

The unit of energy is same as that of

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Power

Work

Torque

Density

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

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Increase

One watt

One erg

One joule

Work has dimension lime

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Torque

Momentum

Velocity

Power

3 Joules of work id done is 3 seconds, then power

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6 Watt

1 Watt

3 Watt

2 Watt

The unit of solar light inversely is

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Watt

kW m-2

Watt m-2

1 m2

The SI unit of power is

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Joule

Newton

Watt

Kilowatt

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