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Resistance of Wire...HeLp!
A 122-cm-long wire is made by welding a 0.36-mm-diameter, 21-cm-long copper wire to a 0.47-mm-diameter, 101-cm-long iron wire. What is the resistance of the composite wire?
How do I do this since it is made up of 2 different materials?
Homework Statement
A 122-cm-long wire is made by welding a 0.36-mm-diameter, 21-cm-long copper wire to a 0.47-mm-diameter, 101-cm-long iron wire. What is the resistance of the composite wire?
Homework Equations
The Attempt at a Solution
How do I do this since it is made up of 2 different materials?