1. The problem statement, all variables and given/known data Use Ampere's Law to show that the magnetic field strength at a distance R from a long, straight wire, carrying a current I, is: H = I/2[itex]\pi[/itex]R 2. Relevant equations F=qVB B=[itex]\mu[/itex]0I/2[itex]\pi[/itex]R 3. The attempt at a solution I'm not sure how to answer this question. I got the integral form of Ampere's Law as: ∫B.dl=[itex]\mu[/itex]0I However I don't understand what the question is asking me. Any help would be much appreciated.