Physics
Ohm's Law (resistance)
Resistance from voltage and current.
Formula
Formula
R = VI
Variables
| Symbol | Definition | Type & range | Units | Role |
|---|---|---|---|---|
| V | voltage (V) | real number (ℝ) | V | input |
| I | current (A) | real number (ℝ) | A | input |
Try it yourself
Interactive calculator
Worked examples
Example 1
Givenvoltage (V) = 12, current (A) = 3
Result4
Example 2
Givenvoltage (V) = 5, current (A) = 0.25
Result20