Computing Joule Heating due to current flow through a wire

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by Abraham Meganathan on 10 Mar 2014
The process by which the flow of electric current through a material of finite conductivity produces heat is known as Joule heating or Ohmic heating or resistive heating. Joule heating is caused by the interaction of moving electrons with the ions in the conductor. Joule heating is defined by the equation P = IV, where P is the power, I is the current, and V is voltage drop across the element. Joule heating may be intended by design, as in heating appliances such as toasters and space heaters. Joule heating may also be undesirable, as when it causes energy losses, elevated temperatures, or dimensional changes in the components of electrical and electronic circuits and devices.