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**1. Homework Statement**

A cylindrical conductor of radius R = 2.49 cm carries a current of I = 2.17 A along its length; this current is uniformly distributed throughout the cross-section of the conductor. Calculate the magnetic field midway along the radius of the wire (that is, at r = R/2).

Radius (m) = 2.49 cm = 0.0249 m = 0.01245 m (as asked)

Current (I) = 2.17 A

**2. Homework Equations**

I thought it was B = µI / 2πr because i was given a sheet of equations and this was the only one that seemed to fit it.

**3. The Attempt at a Solution**

B = µI / 2πr

B = (4π x 10^-7)(2.17) / 2π(0.01245)

B = 3.49e-5 T

Though this isn't the right answer. Not sure what's gone wrong here.

I also thought it was zero since it's a "conductor" also not right...