Two wires A and B of same material, having same lengths and diameters 0.2 mm and 0.3 mm respectively, are…
Two wires A and B of same material, having same lengths and diameters 0.2 mm and 0.3 mm respectively, are connected one by one in a circuit. Which one of these two wires will offer more resistance to the flow of current in the circuit ? Justify your answer.
Solution
Wire A will offer more resistance
Justification:
R ∝ $\dfrac{1}{A}$ /thinner the wire, more resistance to the flow of current.