Alexander Fufaev

Formula: Series Circuit of Resistors

Series connection of three resistors

Electric current

Unit
Total current through the main wire of a series circuit of resistors.

For example, if the current is \( \class{red}{I_1} = 2 \, \mathrm{A} \), then it is also the current flowing through all other resistors and through the main wire: $$ \class{red}{I} ~=~ \class{red}{I_1} ~=~ \class{red}{I_2} ~=~ \class{red}{I_3} ~=~ 2 \, \mathrm{A} $$

Currents

Unit
  • \(\class{red}{I_1}\) is the current flowing through the first resistor.
  • \( \class{red}{I_2}\) is the current flowing through the second resistor.
  • \( \class{red}{I_3}\) is the current flowing through the third resistor.
  • And so on...