An electron is ejected from the surface of a long, thick straight conductor carrying a current, initially in a direction perpendicular to the conductor. The electron will

Options

A. ultimately return to the conductor
B. move in a circular path around the conductor
C. gradually move away from the conductor along a spiral
D. move in a helical path, with the conductor as the axis

Answer

A

Explanation

(a)
The initial force on the electron is downward. As the
electron changes direction, the force on it remains
in teh xy plane, with a component directed toward
the conductor.