Physics
What is a compound microscope?

A microscope whose lenses are convex.
A microscope that has one lens.
A microscope that has two sets of lenses : an occular lens and an eyepiece.
A microscope whose lenses are concave.

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Physics
Indicate the false statement about the resistance of a 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
It is directly proportional to the length of wire

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