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A copper wire has a square cross section 2.68 mm on a side. The wire is...

A copper wire has a square cross section 2.68 mm on a side. The wire is 5.41 m long and carries a current of 3.72 A . The density of free electrons is 8.5×10^28m−3.

Part A)Find the magnitude of the current density in the wire.

J = 5.18×10^5 A/m2

Part B)Find the magnitude of the electric field in the wire.

E = 8.91×10^−3 V/m

PartC) How much time is required for an electron to travel the length of the wire?

t = 1.42×10^5s

PartD)What is the resistance of this wire?

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