In the circuit shown in Fig, find the currents $I$, $I_1$, $I_2$ and $I_3$. Given that emf of the battery
$=2 \mathrm{V}$, internal resistance of the battery $=2 \mathrm{\Omega }$ and resistance of the galvanometer $=4 \mathrm{\Omega }$.

 

Determine the current flowing through the galvanometer $G$ of the Wheatstone bridge shown in Fig.

Find the currents $I_1$, $I_2$ and $I_3$ through the three resistors of the circuit shown in Fig. 3.191.