Heating Effect of Current--

When a resistor is connected with a voltage source, electrons start flow from negative electrode to positive electrode through this resistor and energy of the source gets dissipated in the form of heat produced in the resistor. This phenomenon is called heating effect of current.

 Let we have a resistor ‘R’ which is connected to a Battery of voltage ‘V’ so that current ‘I’ flows Through it. Amount of charge flows through R in time t(q)=It

Amount of  work done to flow charge ‘q’ through Resistor (W) =  qV

So, W= VIt

This work is converted to heat.Hence, Heat produced (H)=VIt

Since, V=IR