A storage battery of emf $8 \mathrm{V}$, internal resistance $1 \mathrm{\Omega }$, is being charged by a $120 \mathrm{V}$ d.c. source, using a $15 \mathrm{\Omega }$ resistor in series in the circuit. Calculate the terminal voltage across the battery during charging.

The following graph shows the variation of terminal potential difference $V$, across a combination of three cells in series to a resistor, versus the current, $i$: Calculate the emf of each cell

The following graph shows the variation of terminal potential difference $V$, across a combination of three cells in series to a resistor, versus the current, $i$: For what current $i$, will the power dissipation of the circuit be maximum?

Apply Kirchhoff’s rules to the loops PRSP and PRQP to write the expressions for the currents $I_1$, $I_2$ and $I_3$ in the circuit shown in Fig.

Use Kirchhoff’s rules to determine the value of the current $I_1$ flowing in the circuit shown in Fig.

Using Kirchhoff’s laws, determine the currents $I_1$, $I_2$ and $I_3$ for the network shown in Fig.

The circuit diagram shown in Fig. has two cells ${\xi }_2$ and ${\xi }_2$ with emfs $4 \mathrm{V}$ and $2 \mathrm{V}$ respectively, each one having an internal resistance of $2 \mathrm{\Omega }$. The external resistance $R$ is of $8 \mathrm{\Omega }$. Find the magnitude and direction of currents flowing through the two cells.

Fig. shows n cells connected to form a series circuit. Their internal resistances are related to their emfs as $r_i=\alpha {\xi }_i$, where α is a constant. Find the current through the circuit.