3. A current of 0.4 ? is flowing out of a battery connected to a circuit. a. If the battery is switched on for 25 ???????, calculate the charge that flowed. b. The battery is 9 ?, calculate the energy transferred  c. What is the rated power of the circuit? d. For the following circuit calculate the equivalent resistance.

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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.