4) The open-circuit voltage of a greenhouse fan battery is measured to be 12 V. While the fan is running, the battery delivers 3 A to the fan's motor, and the battery voltage drops to 11.7 V. a) Draw the Thévenin equivalent circuit for the battery. b) How much power does the battery deliver to the fan?

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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.