In the given circuit,the current through the $2\,\Omega$ resistance is ............ $A$.

A current of $12 \, A$ flows into a system of resistors as shown in the figure. The potential difference between $A$ and $C$ is (in $V$)

Find the potential of $J$ with respect to $G$ in $V$.

Model a torch battery of length $l$ to be made up of a thin cylindrical bar of radius $a$ and a concentric thin cylindrical shell of radius $b$,filled in between with an electrolyte of resistivity $\rho$ (see figure). If the battery is connected to a resistance of value $R$,the maximum Joule heating in $R$ will take place for:

For the given circuit,if $i = 0.25 \, A$,what is the value of $R$ in $\Omega$?

In the circuit diagram shown below,the magnitude and direction of the flow of current respectively would be