Write the mathematical expression for Joule’s law of heating.



Joule’s law of heating states that the heat produced in a conductor is directly proportional to 

(i) the square of  the current I through it, 

(ii) its resistance R and 

(iii) the time t , for which current is passed.

Therefor, the mathematical expression of Joule’s law of heating is: 

     H = I 2 Rt  


  • H = Produced Heat  
  • I = Current flowing through the device  
  • t = Time of current flow  
  • R = Resistance of the appliance 


Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class

Ask a doubt
Maninder Singh's photo - Co-founder, Teachoo

Made by

Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo