Question # 1

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

1 KWh =

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3.6 x 10³K

3.6 x 10⁶K

3.6 x 10⁹J

3.6 x 10¹²J

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 ability of a body to do work is called its

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Force

Power

Capacity

Energy

The SI unit of work is

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Newton

Joule

Mol

Calorie

The unit of work in base unit is

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Kg m-1 sec-2

Kgm sec-2

Kgm2 sec-1

Kgm-1 sec-1

The SI unit of power is

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Joule

Newton

Watt

Kilowatt

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 dimensions of work are

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MLT^-1

MLT^-2

ML²T^-2

ML^-1T^-1

The frictional force is

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Conservative force

Non conservative force

Electric force

Magnetic force

Two quantities involved in work are

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Force and speed

Force and velocity

Force and displacement

Force and acceleration

The work done in gravitational field

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Depend upon the path

Does not depend upon the path

(+)ve

Zero

Biomas is a potential source of

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Renewable energy

Non renewable energy

Botha a and b

Tidal energy

Watt -m2 is the unit of

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Energy

Intensity

Power

Work

Identity the non conservative force among the following.

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Frictional force

Electrical force

Gravitational force

Elastic restoring force

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

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Remain same

Sixteen times

Double

Four times

Work is a

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Scalar quantity

Vector quantity

Basic quantity

None of these

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