Ohm's Law
V = I·R
What it means
Ohm's law relates voltage, current, and resistance in an electrical circuit. It's the foundation of basic circuit analysis.
Variables
| Symbol | Quantity | SI unit |
|---|---|---|
V | voltage | V |
I | current | A |
R | resistance | Ω |
Worked example
Given I = 2 A, R = 3 Ω, solve for V:
V = 6 V