Electricity & Magnetism
Resistors in Series
Total resistance of resistors in series.
Variables
R_eqΩ
Equivalent resistance
Total resistance
R₁Ω
Resistance 1
First resistor
R₂Ω
Resistance 2
Second resistor
Derivation
Same current: V = V₁ + V₂ = IR₁ + IR₂ = I(R₁ + R₂).
Your notes
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Common questions
What is the Resistors in Series formula?
Resistors in Series is written Rₑq = R₁ + R₂ + R₃ + .... Total resistance of resistors in series. It belongs to Electricity & Magnetism, under Electric Circuits.
What are the units in Rₑq = R₁ + R₂ + R₃ + ...?
In SI units, R_eq is equivalent resistance, measured in kg·m²/(A²·s³); R₁ is resistance 1, measured in kg·m²/(A²·s³); R₂ is resistance 2, measured in kg·m²/(A²·s³).
How is the Resistors in Series formula derived?
Same current: V = V₁ + V₂ = IR₁ + IR₂ = I(R₁ + R₂). The result is Rₑq = R₁ + R₂ + R₃ + ....