An electron enters a region of uniform perpendicular and fields.It is observed that the velocity of the electron is unaffected.A possible explanation is:
A)is parallel to and has magnitude E/B
B)is parallel to
C)is perpendicular to both and and has magnitude B/E
D)is perpendicular to both and and has magnitude E/B
E)the given situation is impossible

Question

Quizplus · Accepted Answer

The electron's velocity is unaffected when the electric force (E) and magnetic force (B) cancel each other out. This occurs when the velocity is perpendicular to both fields and has a magnitude of E/B, ensuring the forces are equal and opposite.

An Electron Enters a Region of Uniform Perpendicular and Fields