1. The problem statement, all variables and given/known data I have the following information about the problem. i have the speed of an electron = v the diameter of a circular path = d the length of a solenoid = x the current that the solenoid carried = I I need to find the number of turns in the solenoid. 2. Relevant equations i used the following equations QvB=v2m/r B=[tex]\mu[/tex]NI/l 3. The attempt at a solution then i put "B" in the first equation and i solve for N. Is that correct?