- #1
kaashmonee
- 7
- 1
Homework Statement
Determine the B-field inside the middle of a circular loop of current.
Homework Equations
Attempt at using Ampere's law: ##\oint \vec{B} \cdot d \vec{l} = \mu_0 i##
The Attempt at a Solution
##\oint B \cdot R d \theta = \mu_0 i \Rightarrow BR(2 \pi) = \mu_0 i \Rightarrow B = \frac{\mu_0 i}{2 \pi R}## How do I get the ##2 \pi## term to cancel out when doing this with Ampere's law?