Question # 1

Identity the non conservative force among the following.

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Frictional force

Electrical force

Gravitational force

Elastic restoring force

Kilo watt hour is the unit of

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Power

Energy

Force

Torque

Watt -m2 is the unit of

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Energy

Intensity

Power

Work

Work has dimension lime

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Torque

Momentum

Velocity

Power

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

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

The commercial unit of electric energy is

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Kilo watt hour

watt

Watt hour

Kilo Watt

Which one is a conservative force

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Elastic spring force

Air resistance

Frictional force

Tension in the spring

The space within which gravitational force acts on a body is called

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Electric field

Gravitational field

Magnetic field

Force field

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 SI unit of power is

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Joule

Newton

Watt

Kilowatt

SI unit of work

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Newton

Walt

Pascal

Joule

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

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6 Watt

1 Watt

3 Watt

2 Watt

Work is negative when angle between F and d is

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45^o

₀^o

90^o

180^o

The ability of a body to do work is called its

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Force

Power

Capacity

Energy

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

The dimensions of work are

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MLT^-1

MLT^-2

ML²T^-2

ML^-1T^-1

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