Awire with a length of 150 m and a radius of 0.15 mm carries a current with a uniform current density of 2.8 x 10^7a/m^2. the current is: a) 2.0 a b) 0.63 a c) 5.9a d) 300 a e) 26000 a

The current is 2.0 A.

(A) is correct option.

Explanation:

Given that,

Length = 150 m

Radius = 0.15 mm

Current density

We need to calculate the current

Using formula of current density

Where, J = current density

A = area

I = current

Put the value into the formula

Hence, The current is 2.0 A.

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explanation: