Physics
A spring is an example of which of these

Hooke's law
Newton's 1st law
Conservation of mass law
Newton's 3rd law

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Physics
The blue colour of sky is due to

Refraction of sunlight
Scattering of longer wavelengths of sunlight in the atmosphere
Scattering of shorter wavelengths of sunlight in the atmosphere
Reflection of sunlight

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Physics
Indicate the false statement about the resistance of a wire

It is directly proportional to the length of wire
Resistance of metallic wire increases with increase in temperature
It depends on material of wire
It is directly proportional to the area of cross-section of wire

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