An aluminum wire 5m long and 2mm diameter is connected in parallel with a copper wire 3m long. The total current is 4 A and that in the aluminum wire is 2.5 A. Find the diametre of  the copper wire. The resistivity of copper wire being 1.7 micro ohm meter and that of aluminum taken Al 2.6 micro ohm meter

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Russell E. Smith
Chapter12: Electronic Control Devices
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An aluminum wire 5m long and 2mm diameter is connected in parallel with a copper wire 3m long. The total current is 4 A and that in the aluminum wire is 2.5 A. Find the diametre of  the copper wire. The resistivity of copper wire being 1.7 micro ohm meter and that of aluminum taken Al 2.6 micro ohm meter

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