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Question

Will current flow more easily through a thick wire or a thin wire of the same material, when connected to the same source? Why?

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Solution

Resistance of a wire,

Where,

= Resistivity of the material of the wire

l = Length of the wire

A = Area of cross-section of the wire

Resistance is inversely proportional to the area of cross-section of the wire.

Thicker the wire, lower is the resistance of the wire and vice-versa. Therefore, current can flow more easily through a thick wire than a thin wire.


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