Question

Determine the equivalent total resistance for each of the following circuits below

7

5

2

Answer 1

All resistance is series combination

$$R_{eq}=R_1+R_2+R_3=7+5+2=14\Omega$$

Parallel combination

$\frac{1}{R}=\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}$

$\frac{1}{R}=\frac{1}{7}+\frac{1}{5}+\frac{1}{2}$

$R=1.40\Omega$