Two uniform copper wires X and Y are to be compared.

PHYSICS · Multi-part · CBSE · Physics · Current Electricity · Current Electricity

Problem

Two uniform copper wires X and Y are to be compared. (i) Wire X is

2.0\,\text{m}

long and has a cross-sectional area of

1.0\,\text{mm}^2

. Given the resistivity of copper

\rho = 1.7 \times 10^{-8}\,\Omega\,\text{m}

, calculate the resistance of wire X. (ii) Wire Y is made of the same material. It is

1.0\,\text{m}

long and has a diameter of

2.0\,\text{mm}

. Calculate the resistance of wire Y. (iii) Compare the resistivities of wires X and Y and explain your observation briefly.