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There is a wire made of copper with a diameter of 3.26 mm. A current of...

There is a wire made of copper with a diameter of 3.26 mm. A current of 20.0 A was applied to this wire.
Answer the following question assuming that the electron density of copper is n = 8.47 × 1028 m-3.
(1) Find the current density.
(2) Find the electron drift velocity.
(3) When the resistivity of copper is 1.70 × 10-8 Ω·m, find the voltage drop that occurs along the length of this wire.
(4) Find the electron mobility.

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Answer #1

use all formulae carefully as given below then put given values

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