Difference between revisions of "Kirchoff's 1st Law"
(→Formula) |
(→Formula) |
||
| Line 22: | Line 22: | ||
*<math>\sum I_n</math> represents the sum of all [[Electrical Current|currents]] at [[junction]], | *<math>\sum I_n</math> represents the sum of all [[Electrical Current|currents]] at [[junction]], | ||
| − | *<math>I_1 + I_2 + I_3 +...</math> represents the [[Electrical Current| | + | *<math>I_1 + I_2 + I_3 +...</math> represents the individual [[Electrical Current|currents]] in each [[wire]] attached to the [[junction]], |
*<math>\sum I_{in}</math> represents the sum of all [[Electrical Current|currents]] going into a [[junction]], | *<math>\sum I_{in}</math> represents the sum of all [[Electrical Current|currents]] going into a [[junction]], | ||
Latest revision as of 09:09, 23 May 2024
Key Stage 5
Meaning
Kirchoff's 1st Law states that the total current entering a junction is equal to the total current leaving the junction.
About Kirchhoff's First Law
- Also known as the current law or junction rule.
- Kirchoff's 1st Law is based on the conservation of charge.
- Kirchoff's 1st Law is essential for analyzing complex electrical circuits.
- In Kirchoff's 1st Law the algebraic sum of currents at a junction is equal to zero.
- Kirchoff's 1st Law helps in solving circuit problems by setting up equations based on current conservation.
- Kirchoff's 1st Law is used in network analysis techniques such as mesh analysis and nodal analysis.
- Kirchoff's 1st Law applies to both DC and AC circuits.
Formula
- \(\sum I_n=I_1 + I_2 + I_3 +...=0\)
- \(\sum I_{in}=\sum I_{out}\)
Where:
Examples
- In a parallel circuit, the sum of currents through each branch equals the total current entering the junction.
- Used to determine unknown currents in electrical network problems.