1. The problem statement, all variables and given/known data An electron in an electric field E = 3.0x107 ex NC-1 and a magnetic field B = 3.0 ez T has velocity v = 1.0x107 (2ex - ey) ms-1. Calculate electromagnetic force on the electron. 2. Relevant equations F = q (E + v X B) where q = e- = -1.6x10-19 C 3. The attempt at a solution I have attached a working out, but have difficulty with just one aspect. Whilst working out the matrix vXB I have a negative sign where I think a positive sign should be. I have attached the working as a pic. Could someone show me why I am correct or incorrect. Thank you.