🔌 Ohm's law

Unit 3 · Forces, energy & reactions · 9 min

Voltage = current × resistance (V = I × R). Volts (V), amperes (A), ohms (Ω). With fixed resistance, more voltage means more current. Warning: mains power is dangerous; experiment with batteries only.

Words in this lesson

• 电压 (diàn yā) — voltage
• 电流 (diàn liú) — current
• 电阻 (diàn zǔ) — resistance

Project: In the sim, fix the resistance, vary voltage 1–9 V, log the current and graph it.