Power As A Function of Resistance
The power dissipated by a linear resistor may be calculated from its resistance, and voltage or current. The formula is a combination of Ohm's law and Joule's laws:
where:
- P = power in watts
- R = resistance in ohms
- V = voltage across the resistor
- I = current through the resistor in amps
This formula is applicable to devices whose resistance varies with current.
Read more about this topic: Ohm
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