Current Electricity
Class 12 · Current Electricity

Parallel Circuit

1/R_t = Σ1/Rᵢ. Same V. I splits inversely with R.

Run simulation

Key Notes

01

Same voltage V across all branches.

02

Currents add: I_total = ΣI_i.

03

1/R_eq = Σ1/R_i. R_eq is smaller than the smallest branch.

Formulas

Parallel

Reciprocal addition.

Two-resistor

Special case.

Important Points

If one branch opens, others continue working.

Used in home wiring — appliances in parallel get full V independently.

Parallel Circuit notes from sciphylab (also known as SciPhy, SciPhy Lab, SciPhy Labs, Physics Lab). Class 12 physics revision for JEE Mains, JEE Advanced, NEET UG, AP Physics 1/2/C, SAT, and CUET-UG.