In the following electrical network,the value of $I$ is (in $A$)

The current through the wire $XY$ of the circuit shown is ................ $A$.

In the circuit shown,what is the potential difference $V_{PQ}$?

In the Wheatstone's bridge (shown in figure) $X = Y$ and $A > B$. The direction of the current between $a$ and $b$ will be

The figure shows a circuit diagram of a 'Wheatstone Bridge' to measure the resistance $G$ of the galvanometer. The relation $\frac{P}{Q} = \frac{R}{G}$ will be satisfied only when

The potential at point $E$ for the given figure is ................ $V$.