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 ?

Introductory Circuit Analysis (13th Edition)
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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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