The heat generated by the joule effect The work done on the carriers is Qv The work done on the carriers in unit time is QV t The work done on the carriers in unit time and unit volume is ViV 3-12l JE=O E2 This is converted into the heat generated in unit time and unit volume due to the joule effect or a resistor carrying a current I the voltage across it is IR and the heat generated in unit time is /V=/(IR)=R