1. The problem statement, all variables and given/known data An electron enters a solenoid at 65 degrees below a solenoid. The solenoid has a 10 A clockwise current is 33.0 m long and has 400 turns. Ignoring end effects what is the shortest amount of time in which the electron pass through the solenoid? 2. Relevant equations Only one I got in my text for solenoids is B=mu_0 NI 3. The attempt at a solution I am able to find the B field causes by the solenoid by plugging in the values I have 4piE-7 * 400 * 33.0 = 0.17 T. However what I'm stuck on is figuring out the time interval of the particle. I've used the text and I've use google and search as I want I can't find a formula to use. Any help with formulas would be appreciated.