In the shown circuit,what is the potential difference across $A$ and $B$ (in $V$)?

The value of current through the $20\,\Omega$ resistor is ............ $A$.

For the given circuit,the currents $I$ and $I_2$ are respectively:

In the circuit shown,the current in the $1\,\Omega$ resistor is

$A$ battery of $10 \;V$ and negligible internal resistance is connected across the diagonally opposite corners of a cubical network consisting of $12$ resistors each of resistance $1 \;\Omega$. Determine the equivalent resistance of the network and the current along each edge of the cube.

In the circuit shown in the adjoining figure,the current between $B$ and $D$ is zero. The unknown resistance $X$ is ................ $\Omega$.