Question

Find the equivalent resistance of three resistors, each of 3 ohms, connected in parallel.

Answer 1

$\frac{1}{R_{eq}}=\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}\Rightarrow \frac{1}{R_{eq}}=\frac{1}{3}+\frac{1}{3}+\frac{1}{3}\therefore R_{eq}=1\Omega$