In a certain velocity selector consisting of perpendicular electric and magnetic fields, the charged particles move toward the east, and the magnetic field is directed to the north. What direction
Should the electric field point?
A) downward
B) toward the east
C) upward
D) toward the west
E) toward the south

Question

Quizplus · Accepted Answer

The electric field must point downward to balance the upward magnetic force on the positively charged particles.

In a Certain Velocity Selector Consisting of Perpendicular Electric and Magnetic