Question

2) A charge of +8 micro-coulombs is initially moving at 4 m/s in the +y direction. Initially it is in a uniform magnetic field in the +z direction. After half a period, instantaneously, the magnetic flips to the -z direction and and its magnitude changes as well. After another half a period, the charge is located at x = +8 m, y = 0 m. How long does the charge take to get from the origin to its final point, in seconds?

Answer 1

The answer for above problem is explained below.