Example 6 to An amount of energy equal to 100 J is used in 5 s. What is the power Solution P = W/ t =100 J/5 sec = 20 W Example 7 What power is dissipated in a 100 Q resistor with 5 V across it? Solution v2 P = R (5)2 = 0.25 W %D %3D 100

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Electrical Heating Unit

The conversion of electrical energy to heat energy is known as electric heating. The heating system that converts the electrical energy to heat energy for various application is called electrical heating unit. Electricity is employed as the firing mechanism in electric heating systems, which transforms electric current to heat. Electric heaters have heating elements in the form of electric resistors.