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*<math>\sum V_n=V_1 + V_2 + V_3 +...=0</math>
*<math>\sum \epsilonvarepsilon=\sum V_{pd}</math>
Where:
*<math>\sum V_n</math> represents the sum of all [[Potential Difference|voltages]] in a loop(including [[Electromotive Force|emfs]] and [[Potential Difference|pds]]),
*<math>V_1 + V_2 + V_3 +...</math> represents the individual [[Electromotive Force|emfs]] and [[Potential Difference|pds]] of each component in a loop,
*<math>\sum \epsilonvarepsilon</math> represents the sum of all [[Electromotive Force|emfs]] in a loop,
*<math>\sum V_{pd}</math> represents the sum of all [[Potential Difference|potential differences]] across components in a loop
===Examples===
*In a [[Series Circuit|series circuit]], the sum of the [[Potential Difference|voltage]]s across each component equals the total [[Potential Difference|voltage]] supplied by the [[Electrical Battery|battery]].*Applied to find the [[Potential Difference|potential differences ]] and [[Electromotive Force|emfs ]] in [[Electrical Circuit|electrical circuits]].