A circuit has two 10 ohm resistors in parallel. What is the total circuit resistance?
A) 30 ohms
B) 15 ohms
C) 10 ohms
D) Less than 10 ohms

Question

Quizplus · Accepted Answer

When two resistors are in parallel, the total resistance is less than the smallest individual resistance. The formula for total resistance $R_{total}$ in parallel is $\frac{1}{R_{total}} = \frac{1}{R_1} + \frac{1}{R_2}$, which for two 10 ohm resistors gives $R_{total} = 5$ ohms.

A Circuit Has Two 10 Ohm Resistors in Parallel