Electrical Engineering › Section D · Parallel and series-parallel circuits › Topic D.3
The current divider rule
When current reaches a set of parallel branches, it splits in a fixed pattern set by the resistances. The current divider rule finds each branch's share directly, the parallel partner of the voltage divider rule.
In this topic
- How current splits
- Reasoning with ratios
- The general rule
- Two branches: the other resistor on top
- Worked example: two branches
- Worked example: three branches
- Worked example: choosing a resistor
- Quick fractions for estimates
- Very unequal branches
- Common mistakes to avoid
- Key takeaways
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