1. The problem statement, all variables and given/known data this is the equation for flux density we have been given, the radius 30mm, z= goes in stages of 10mm, from zero to 50mm, then from zero to -50mm. that symbol at the begin of equation is 4 pie ! and the current is 5 amps. its is for a single-loop coil 2. Relevant equations 3. The attempt at a solution I have tried the equation and the answer is nothing like my experimental results. which is 6.2 mV, at 10mm.