Series Circuits

One path, shared voltage

An interactive lesson with 6 steps, about 5 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• Series: one path, so the same current flows through everything.
• Resistances add: $R = R_1 + R_2$. The voltages share the battery voltage, in proportion to resistance.
• Break the loop anywhere and everything stops.

Steps

1. Add a bulb
2. Two in a row
3. Series rules
4. Total current
5. Voltage share
6. Old Christmas lights