The current in the arm $CD$ of the circuit will be

In the given part of a circuit,the potential at point $B$ is zero. Then the potentials at $A$ and $C$ respectively are

Determine the current in each branch of the network shown in Figure.

In the circuit shown,$E_1 = 4.0 \ V, R_1 = 2 \ \Omega, E_2 = 6.0 \ V, R_2 = 4 \ \Omega$ and $R_3 = 2 \ \Omega$. The current $I_1$ is : ................ $A$

The Wheatstone bridge principle is used to measure the specific resistance $(S_1)$ of a given wire,having length $L$ and radius $r$. If $X$ is the resistance of the wire,then the specific resistance is: $S_1 = X \left( \frac{\pi r^2}{L} \right)$. If the length of the wire is doubled,then the value of the specific resistance will be:

What is the equivalent resistance between $A$ and $B$ in the given circuit (in $\Omega$)?