Please explain the waveform of the voltage across resistor R (= 2KΩ). You can explain it by drawing the current paths in the circuit when the magnitude of the voltage source is positive and negative, respectively.

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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.