Parallel Resistance

Parallel Resistance

EL-05
ASPCSPAdvanced

Formula
1/R_parallel = 1/R₁ + 1/R₂ + ... + 1/Rn
When to Use

Calculate total resistance when resistors are connected side-by-side (in parallel). Total resistance decreases.

Symbol Legend
SymbolMeaningUnitNote
R_parallelTotal equivalent resistance )Ohms (ΩAlways less than smallest individual R
R₁...nIndividual resistance values )Ohms (Ω

🔒

Worked Example for Blueprint Members

Blueprint members get full exam-style worked problems, step-by-step solutions, solution videos, common exam traps, and linked practice questions — for every equation.

Join Be Safe ASP | CSP Blueprint™ →