A Current Flows Through an Aluminum Wire

A current flows through an aluminum wire.The aluminum wire has a length of 2.00 m,a diameter of 0.0300 cm,and a carrier density of 6.02 * 10²⁸ electrons/m³.If the electron drift velocity is 1.84 * 10^-4 m/s,what is the current density in the wire?

A) 1.93 * 10⁶ A/m²
B) 1.18 * 10⁶ A/m²
C) 1.36 * 10⁶ A/m²
D) 1.53 * 10⁶ A/m²
E) 1.77 * 10⁶ A/m²

Correct Answer:

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