1. A 120 V generator delivers 15KW to an electric furnace. What current is the generator supplying? 2. A cell phone draws 3.2 A when plugged in to a 12V cigarette lighter outlet of a car. What power must the car battery deliver? 3. A common resistance of carbon resistors is 33 Q. How many 33-Q resistors, connected in parallel, are needed to give a total resistance of 5.5 Q? 4. Without doing the calculations, what is the approximate equivalent resistance of a 10-Q resistor and a 1-M Q resistor connected in parallel? 5. Find the total resistance for the resistor circuit shown in the figure below. 1 M2 5 M2 2 k2 600 N 200 k2

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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.