The resistor glows brighter as it burns more power — P = V·I = I²R = V²/R.
▸
Options
▸
Presets
9 V & 470 Ω
5 V USB @ 0.5 A
60 W bulb @ 230 V
0.5 A through 10 Ω
I know…
Voltage & Resistance
Voltage & Current
Current & Resistance
Power & Voltage
Power & Current
Power & Resistance
Voltage (V)
Resistance (Ω)
Voltage V
—
Current I
—
Resistance R
—
Power P
—
Ohm's Law + Power Calculator · Made with LK Forge ↗
The Ohm's law calculator needs JavaScript to run.