This question has been answered but the given answer doesn\'t fit the answer sel

Question

This question has been answered but the given answer doesn't fit the answer selections that are given with the question

(1) 1.75e^-6

(2) 2.35e6^-6

(3) 3.51e^-6

(4) 1.75e^-5

(5) 2.35e^-5

(6)5.10e^-5

and the answer selections for 3A are:

(1) 1.64e^-5

(2) 2.45e^-5

(3) 3.11e^-5

(4) 3.65e^-5

The answer given on here 7 years ago doesn't even come close, though I got the same. So either the selections are wrong or my calculations and that of the person who previously provided an answer to this question are wrong. Help.

Explanation / Answer

Flux = ( Density of flux ) x (A)

Use Ampere's Law

B = (u0) I /(2pi)r

u0 = 4pi x 10^-7 T m / A

B = (4pi x 10^-7)(5)/2(3.14)(0.03)

magnetic flux density of 5A current is

B = 3.33 x 10^-5 Tesla = 3.33 x 10^-5 Weber/m^2

Flux density due to the 3 A current only is

B =2.99 x 10^-5 Webers/m^2

use right hand rule the B field points Out of the Page.
since they both point out of the page, so the total flux density is

B = (3.33 x 10^-5 + 2.99 x 10^-5)

B= 6.32 X 10^-5 Wb/m^2

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