Secondary · Physics Round 1/6 Score 0

⚡ Series or Parallel?

Pick your resistors. Hit the current or power target.

Your circuit

Ammeter 0.00 A
Voltmeter 0.00 V
Total resistance 0.00 Ω
Total power 0.00 W
V I R Series: R = R₁ + R₂ Parallel: 1/R = Σ(1/Rᵢ) Power: P = VI
Ohm's law connects p.d., current and resistance.

Build and adjust

Live I–V graph

The physics

Ohm's law: V = IR, with V in volts, I in amperes and R in ohms.

Series: R_total = R₁ + R₂ + R₃. The same current passes through each resistor.

Parallel: 1/R_total = 1/R₁ + 1/R₂ + 1/R₃. Each branch has the same p.d.

Power: P = VI = V²/R. For ideal resistors, the I–V line passes through the origin.