\text{FIGURE IV.3}G=G_1+G_2+G_3.\label{4.5.1} That is to say \frac{1}{R} = \frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}.\label{4.5.2} The potential difference is the same across each. The cu...\text{FIGURE IV.3}G=G_1+G_2+G_3.\label{4.5.1} That is to say \frac{1}{R} = \frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}.\label{4.5.2} The potential difference is the same across each. The current is greatest through the largest conductance – i.e. through the smallest resistance.