Question # 1

Action and Reaction are always on:

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Same body

Different bodies

Any body

None of these

Which of the substance is the lightest one?

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Copper

Mercury

Aluminim

Lead

A body possesses if it is capable to do work:

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Energy

Power

Force

All

What happens to the thermal conductivity of a wall if its thickness is doubled?

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Become double

Remain the same

Become half

Become one fourth

1 KW (kilo Watt) is equal to:

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10² W

10³ W

10⁵ W

10⁶W

The centre of gravity of irregular shaped body can be found with the help of:

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Wedge

Meter rod

Plumb line

Screw gauge

In graph referenc epoint is taken as.

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Origin

x-axis

variable

coordinates

Gravitational force is a:

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Electric force

Magnetic force

Reactional force

Electromotive force.

In measurement 1.032 numbers of significant figure are.

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1

2

3

4

Worst absorber of heat is:

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Dull black surface

Coloured surface

Shinning silvered surface

White surface

The machine which use unequal masses to find the value of "g" is ________

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Free fall apparatus

Atwood machine

Pulley

None

Which surface is bad emitter:

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White surface

Black surface

Coloured surface

Silver surface

Formula of Power:

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P = wt

P = w/t

P = t/w

P = w/t²

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