A particle having a charge of +10 micro coulombs is moving having a speed of 300 m/s in the positive z direction.
i) Determine the minimum magnetic field needed to keep it moving in a straight line at constant speed when there is a uniform electric field of magnitude 100 V/m pointing in the positive y-direction?
ii) Determine the minimum magnetic field needed to keep it moving in a straight line at constant speed when there is a uniform electric field of magnitude of 100 V/m pointing in the positive z-direction?