Resistor and Resistance Table of Contents Toggle Resistor in SeriesResistor in Parallel Resistance is a property of a material that opposes the flow of current. Resistor in Series Req=R1+R2+R3+⋯+Rn=∑i=1nRiR_{\text{eq}} = R_1 + R_2 + R_3 + \dots + R_n = \sum_{i=1}^{n} R_i Resistor in Parallel
