A dc source with internal resistance $R_0$ is connected to three identical resistors each of resistance $R$ as shown in the figure. If the thermal power generated in the circuit is highest, then

Thirteen resistors each of resistance $R$ are connected in the circuit as shown in the following figure. Net resistance between $A$ and $B$ is

In the circuit, the galvanometer $G$ shows zero deflection. If the batteries $A$ and $B$ have negligible internal resistance, then the value of $R$ is

What will be current through the $200 \mathrm{\Omega }$ resistor in the given circuit, a long time after the switch $K$ is switched on?

In the circuit element given here, if the potential at point $B, V_B=0$, then the potentials of $A$ and $D$ are given as