Electric Power in a Resistor (P = VI = I²R = V²/R)
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P = VI = I²R = V²/R
What each symbol means
| Symbol | What it stands for |
|---|---|
| I | Current (A) |
| P | Power dissipated (W) |
| R | Resistance (Ω) |
| V | Voltage (V) |
When to use this
Ohmic conductor; DC steady; thermal energy in resistor.