Question

A 0.3mm diameter copper wire carries a current of 2.A find the current density.​

Answer 1

Answer:

your answer is 28.30 ×10⁶ A/m²

Explanation:

Here gives diameter

so we have to find out area.

radius is 0.15 mm

area(A)= πr²

and then ,

current density (j) = current ( I )/area (A)

put the all value.