#44© BrainMass Inc. brainmass.com September 19, 2018, 4:33 pm ad1c9bdddf - https://brainmass.com/physics/amperes-law/magnitude-magnetic-field-19196
I will use the symbol "Sc" for the Integral over a closed curve c and u0 for the permeability of free space.
Sc ( B.dr ) = u0 * I
Thus, Ampere's Law states that ...
This question shows how to find the magnitude of a given magnetic field.