A particle with charge q is moving with speed υ in the −y-direction. It is moving in a uni...

A particle with charge q is moving with speed υ in the −y-direction. It is moving in a uniform magnetic field B = (a) What are the components of the force  exerted on the particle by the magnetic field? (b) If q > 0, what must the signs of the components of  be if the components of  are all nonnegative? (c) If q<0 and Bx = By = Bz > 0, find the direction of  and find the magnitude of  in terms of |q|, υ, and Bx.