Two wires A & B made from two different materials have temperature coefficient of resistance equal to 0.0025 and 0.0005 ohm per C , respectively . It is desired to make a coil of wire having a resistance of 1200ohms with a temperature coefficient of 0.001 , using suitable lengths of the two given wires connected in series . Determine the required length of wire A ?

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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.