Question

In a electric circuit with a resistance wire and a cell, the current flowing is I. What would happen to this current if the wire is replaced by another thicker wire of the same material and same length? Give reason.

Answer 1

We know

R = ρ (L/A)

So, if A increases, the value of R will decrease.

A thicker wire will have a higher area of cross-section. Thus, according to the formula, it will have a lesser resistance.