The potential difference across $A$ and $B$,i.e.,$V_A - V_B$,is ......... $V$.

Thirteen resistances,each of resistance $R \, \Omega$,are connected in the circuit as shown in the figure below. The effective resistance between $A$ and $B$ is

Two batteries $A$ and $B$, each of e.m.f. $2 \, V$, are connected in series to an external resistance $R = 1 \, \Omega$. If the internal resistance of battery $A$ is $1.9 \, \Omega$ and that of $B$ is $0.9 \, \Omega$, what is the potential difference between the terminals of battery $A$?

The figure shows a network of resistors and a battery. If $1\,A$ current flows through the branch $CF$,then find the $emf$ $E$ of the battery. (in $,V$)

Consider the circuits shown in the figure. Both the circuits draw the same current from the battery,but the current through $R$ in the second circuit is $\frac{1}{10}$th of the current through $R$ in the first circuit. If $R = 11 \ \Omega$,the value of $R_1$ is ................ $\Omega$.

For the circuit shown,the value of current at time $t=3.2 \, s$ will be ...... $A$. (Voltage distribution $V(t)$ is shown by Figure $1$ and the circuit is shown in Figure $2$)