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A 1.0 m length of copper wire has a cross-sectional area of 0.4x10-6 m2 and carries...

  1. A 1.0 m length of copper wire has a cross-sectional area of 0.4x10-6 m2 and carries a current of 50 mA (a fairly typical amount of current).
    1. What is the current density magnitude in this wire?
    2. What is the electron drift speed in this wire?
    3. How long will It take for an electron to travel the length of the wire (traveling at the speed you just calculated)?
    4. What is the magnitude of the electric field inside the wire?
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