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Joules Heating

When some potential difference V is applied across a resistance R, then the work done by the electric field on charge q to flow through the circuit in time t will be
 
W = qV = Vit = i2Rt 75408.png
 
This work appears as thermal energy in the resistor.
 
Heat produced by the resistance R is
 
75421.png
 
This relation is called joules heating.




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