20,345
edits
Changes
→Key Stage 5
*[[Kirchoff's 1st Law]] is used in network analysis techniques such as mesh analysis and nodal analysis.
*[[Kirchoff's 1st Law]] applies to both [[Direct Current|DC]] and [[Alternating Current|AC]] circuits.
===Formula===
<math>\sum_{i=1}^n I_i</math>
===Examples===
*In a [[Parallel Circuit|parallel circuit]], the sum of currents through each branch equals the total [[Electrical Current|current]] entering the [[junction]].
*Used to determine unknown currents in electrical network problems.