Question # 1

Work is a

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Scalar quantity

Vector quantity

Basic quantity

None of these

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

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Increase

One watt

One erg

One joule

Which one is a conservative force

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Elastic spring force

Air resistance

Frictional force

Tension in the spring

The formula for the power is

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P= W/d

P=W/v

P=W/t

P=Wt

Energy dissipated usually appears as

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P.E.

Heat Energy

Chemical energy

Nuclear Energy

SI unit of work

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Newton

Walt

Pascal

Joule

Two quantities involved in work are

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Force and speed

Force and velocity

Force and displacement

Force and acceleration

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

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x-axis

y-axis

z-axis

None of these

The commercial unit of electric energy is

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Kilo watt hour

watt

Watt hour

Kilo 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

1 KWh =

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3.6 x 10³K

3.6 x 10⁶K

3.6 x 10⁹J

3.6 x 10¹²J

When the rocket moves away from the earth, the work against gravity

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Remains constant

Varies directly with distance

Varies inversely with distance

Varies inversely with square of distance

The dimensions of work are

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MLT^-1

MLT^-2

ML²T^-2

ML^-1T^-1

The unit of solar light inversely is

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Watt

kW m-2

Watt m-2

1 m2

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 tides raise in the sea roughly

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Once a day

Twice a day

Three a day

Four time a day

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

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Remain same

Sixteen times

Double

Four times

The ability of a body to do work is called its

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Force

Power

Capacity

Energy

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