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Physics

Physics
If a copper wire is increased to double its length, its resistance will become

Double
One–fourth
Half
Four times

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Physics
Number of lattices in the orthorhombic system is

7
4
5
8

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Physics
The phenomenon of light associated with the appearance of blue colour of the sky is

Interference
Reflection
Refraction
Scattering

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Physics
The velocity of heat radiation in vacuum is

Equal to that of sound
Less than that of light
Equal to that of light
Greater than that of light

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Physics
In mirrors the back surface is coated with a thin layer of :

Red oxide
Silver nitrate
Silver
Mercury

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Physics
The inability of a body to change its state of rest or uniform motion along a straight line is called its

Inertia
Acceleration
Velocity
Momentum

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