Five resistors,each of resistance $R$,are arranged as shown in the figure. $A$ battery of voltage $V$ is connected between points $A$ and $B$. Find the current flowing through the branch $AFCEB$.

In the circuit,$E_1 = E_2 = E_3 = 2 \text{ V}$ and $R_1 = R_2 = 4 \text{ } \Omega$. Then the current flowing through $E_2$ is

In the given circuit,the galvanometer shows zero deflection. What is the value of $R$ in $\Omega$?

In a Wheatstone bridge (see figure),resistances $P$ and $Q$ are approximately equal. When $R = 400 \,\Omega$,the bridge is balanced. On interchanging $P$ and $Q$,the value of $R$ for balance is $405 \,\Omega$. The value of $X$ is close to ................. $\Omega$. (in $.5$)

Find the value of current $i_1$ for the circuit shown in the figure. (in $, A$)

The figure shows a part of an electric circuit. The potentials at points $a$,$b$,and $c$ are $30\,V$,$12\,V$,and $2\,V$ respectively. The current through the $20\,\Omega$ resistor will be $........\,A$.