Current Divider (Two Parallel Branches) (I1 = I × R2/(R1+R2): current through R1 when total I)

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I1 = I × R2/(R1+R2) — current through R1 when total I enters parallel pair

What each symbol means

SymbolWhat it stands for
ITotal current entering the parallel pair (A)
I_1Current through branch with R1 (A)
R_iParallel branch resistances (Ω)

When to use this

Two-branch parallel; same V across branches; DC.