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September 20, 2014

Homework Help: college physics

Posted by Zell on Monday, February 25, 2013 at 2:04am.

A 4m long copper wire has a diameter of 2mm and carries a current of 10A.

Determine the ff:
a. current density in the wire
b. electric field
c. potential difference between the ends of the wire
d. resistance of the wire

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