Embibe Experts Solutions for Chapter: Current Electricity, Exercise 1: Exercise 1

A $2$ ampere current flows in a uniform conductor which has $1\times {10}^{24}$ free electrons per metre. What is their average drift velocity?

Two copper wires have the same length but the second has diameter twice that of the first. If the resistance of the first is $2$ ohms, the resistance of the second is

A wire of resistance $R$ and of radius $r$ is compressed back to another wire of radius $2 \mathrm{r}$, the new resistance of the wire will be

A wire of resistance $R$ is cut into $n$ equal parts. These parts are then connected in parallel. The equivalent resistance of the combination will be

Half part of a wire of resistance $R$ is stretched to make it $1\%$ longer and remaining half is stretched to make it $2\%$ longer. The new resistance of the wire is nearly

Current density of $\mathrm{J}$ is flowing in a resistor of resistivity $\rho$. We can thus recognize ${\mathrm{J}}^2\rho$ as the

The equivalent resistance between A and B in the following network is

A part of a circuit is shown in the figure in steady state. The energy stored in the capacitor is