研究所、轉學考(插大)◆普通物理學題庫下載題庫

14. In a region where there is an electric field E and a magnetic field B, a charged particle is observed to travel straight without deflection. What is the speed of the particle if the fields are perpendicular to each other?
(A) E+B
(B) B/E
(C) EB
(D) 1/(EB)
(E) E/B