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A copper wire has a square cross section 3.0 mm on a side. The wire is...

A copper wire has a square cross section 3.0 mm on a side. The wire is 3.8 m long and carries a current of 3.5 A. The density of free electrons is 8.5×1028m−3.

A) Find the magnitude of the electric field in the wire.

Express your answer in volts per meter.

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

Express your answer in seconds

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