ABSTRACT

Resistance is associated with the phenomenon of energy dissipation. In its simplest form, it is a measure of the opposition to the flow of current by a piece of electric material. Resistance dissipates energy in the form of heat; the best conductors have low resistance and produce little heat, whereas the poorest conductors have high resistance and produce the most heat. For example, if a current of 10 A flowed through a resistance of 1 , the heat would be 100 W. If the same current flowed through 100 , the heat would be 10,000 W, which is found with the equation

(10-1) where, P is the power in watts, I is the current in amperes, R is the resistance in ohms.