How do you calculate 4 resistors in parallel?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
Use the parallel resistance formula with four terms:
1/R_eq = 1/R₁ + 1/R₂ + 1/R₃ + 1/R₄
Example: For 12Ω, 6Ω, 4Ω, and 3Ω in parallel:
- 1/R_eq = 1/12 + 1/6 + 1/4 + 1/3 = 1/12 + 2/12 + 3/12 + 4/12 = 10/12
- R_eq = 12/10 = 1.2Ω
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