(A) What angle(s) does a particle's velocity have to make with the magnetic field direction for the particle to be subjected to half the maximum possible magnetic force, Fmax?
(B) Express the magnetic force on a charged particle in terms on Fmax if the angle between its velocity and the magnetic field direction is (i) 10 degrees, (ii) 80 degrees, and (iii) 100 degrees.
(C) if the particles's velocity makes an angle of 50 degrees with respect to the magnetic field direction, at what other angle(s) would the magnetic fore on it be the same? Explain.