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Circuit Builder

Build a series or parallel circuit with up to three resistors and see resistance, current, voltage and power update live.

Circuit Builder

Set the battery voltage, add up to three resistors, and switch between series and parallel.

Connection:
Total resistance…
Total current…
Total power…
ResistorResistanceVoltage across itCurrent through itPower

Series: R = R₁+R₂+R₃
Parallel: 1/R = 1/R₁+1/R₂+1/R₃
V = IR
P = VI