1. Consider the following resistive "bridge" network. 84V 8ΚΩ 4kQ 4kQ S₁ 4ΚΩ 8ΚΩ a. When the switch S₁ is open, what is the total equivalent resistance of the resistors in the dashed box? b. What is the potential difference Vab across the open switch? c. When the switch S₁ is closed, what is the total equivalent resistance of the resistors in the dashed box? (Note that this is not simply a combination of resistors in series and resistors in parallel.)

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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.