V.K. Sally Solutions for Chapter: Electricity, Exercise 4: Practice Problems : 1

A wire of resistance $4.5\mathrm{\Omega }$ and length $150 \mathrm{cm}$, has area of cross-section of $0.04 {\mathrm{cm}}^2$. Calculate specific resistance of wire in SI units

A wire of length $40 \mathrm{cm}$ and area of cross-section $0.1 {\mathrm{mm}}^2$ has a resistance of $0.8\mathrm{\Omega }$. Calculate specific resistance of wire in SI units

The resistance of a metal wire of length $1 \mathrm{m}$ is $26 \mathrm{\Omega }$ at $20°\mathrm{C}$. If the diameter of the wire is $0.3 \mathrm{mm}$, what will be the resistivity of the metal at that temperature?