An electron travels due north through a vacuum in a region of uniform magnetic field that is also directed due north. It will:
A) be unaffected by the field
B) speed up
C) slow down
D) follow a right-handed corkscrew path
E) follow a left-handed corkscrew path

Question

An electron travels due north through a vacuum in a region of uniform magnetic field  that is also directed due north. It will:
A) be unaffected by the field 
B) speed up 
C) slow down 
D) follow a right-handed corkscrew path 
E) follow a left-handed corkscrew path

Quizplus · Accepted Answer

The magnetic field is directed in the same direction as the electron's motion, so the force on the electron due to the magnetic field is zero. Therefore, the electron will be unaffected by the field and continue traveling at a constant speed in a straight line.

An Electron Travels Due North Through a Vacuum in a Region