If a Current of 2

Multiple Choice

If a current of 2.4 A is flowing in a cylindrical wire of diameter 2.0 mm,what is the average current density in this wire?

A) 7.6 × 10⁵ A/m²
B) 5.2 × 10^-6 A/m²
C) 1.9 × 10⁵ A/m²
D) 3.6 × 10⁵ A/m²
E) 21 × 10^-6 A/m²