1. The problem statement, all variables and given/known data In the figure below, an electron moves at speed v = 93 m/s along an x axis through uniform electric and magnetic fields. The magnetic field B is directed into the page and has magnitude 4.00 T. In unit vector notation, what is the electric field? Figure: http://imageshack.us/photo/my-images/233/webassign2.jpg/ 2. Relevant equations v=E/B 3. The attempt at a solution I know that the answer is 0 for the i and k direction. I thought for the j direction, I just had to use the formula v=E/B, which would give me 372. But that's incorrect. I don't know what else to try.