##  [Joule's Law](/joules-law) 

  ##  [Joule's Law](https://engineering.quantumdictionary.io/joules-law-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

The relation that, for an ohmic conductor with (approximately) constant resistance R carrying electrical current I for time t, the electrical energy converted to heat is Q = I² R t and the instantaneous electrical power dissipated is P = I² R; applicable where resistive (ohmic) loss dominates and resistance can be treated as defined over the interval.