# Resistors in Series

Resistors in Series

The current in a circuit can be calculated by using Ohm's law: voltage equals resistance times current. In symbols, . In this simple circuit, the two resistors are in series, so the effective resistance =+. The current is then . No current flows when the circuit is open.

V=IR

R

tot

R

1

R

2

I=+

V

R

1

R

2