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Power

  • Power is a term that usually means wattage.
  • Wattage (W) is a convenience unit to describe electricity that includes amps and voltage, multiplied together (watts = amps x volts).
  • Volts and amps can be traded for each other in a current, as long as the overall amount of work (Wattage), stays the same. This is often done through induction.

Power Calculations Derived from Ohm's Law​

In addition to the standard definition of a watt (volts * amps), power can be calculated when only volts or amps and resistance is known:

  • When amperage (current) and resistance is known: P = I^2 * R
  • When voltage (force) and resistance is known: P = V^2 / R