p(t) Watt 1200 1000 800 600 400 200 10 -200 -400 Time (msec) Q Zoom image O Frequency 50 Hz Average power = 750 Watt O Frequency = 25 Hz Average power 250 Watt O Frequency = 200 Hz Average power 1000 Watt 93°F

Q: What is the RMS value of 169sin 377t?   Answer: 119.5 volts

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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.