Question

An electron, moving toward the west, enters a uniform magnetic field. Because of this field the electron curves upward. The direction of the magnetic field is towards:

up
north
down
south
west

Answer 1

north ..since according to lorentz force it is F= q(v*B)+qE, so magnetic field is perpendicular to the direction of velocity

Answer 2

i thought so but whats the difference of up and north

Answer 3

up means out of the plane but north means on the plane but perpendicular to the direction of velocity ...since electron curves upward so magnetic field is in perpendicular to the velocity and cross product of velocity and magnetic field gives direction of force on electron that is upward

Answer 4

thank you so much for your help

Answer 5

anytime