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1. The problem statement, all variables and given/known data

A single loop of wire of radius 3 cm carries a current of 2.6 A. What is the magnitude of B on the axis of the loop at 2 cm?

2. Relevant equations

B=[tex]\mu[/tex]/(4[tex]\pi[/tex]) * 2[tex]\pi[/tex](R^2)*I/(z^2+R^2)^(3/2)

3. The attempt at a solution

I = 2.6 A

R = .03 m

z = .02m

I calculate .000031 T

It should just be a simple matter of plugging in numbers, but every time I use this equation it ends up being wrong. If anyone could tell me what I might be doing wrong it would be greatly appreciated.

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# Magnetic Field due to a current loop

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