A Charged Particle (Mass = M, Charge = Q >

Multiple Choice

A charged particle (mass = M, charge = Q > 0) moves in a region of space where the magnetic field has a constant magnitude of B and a downward direction. What is the magnetic force on the particle at an instant when it is moving horizontally toward the north with a speed V?

A) QVB toward the east
B) Zero
C) QVB toward the west
D) QVB upward
E) QVB toward the south