question_answer

A stream of electrons is projected horizontally to the right. A straight conductor carrying a current is supported parallel to electron stream and above it. If the current in the conductor is from left to right then what will be the effect on electron stream                                                         [Roorkee 2000]

A)            The electron stream will be pulled upward

B)            The electron stream will be pulled downward

C)            The electron stream will be retarted

D)            The electron beam will be speeded up towards the right

Correct Answer: B

Solution :

                   According to Fleming?s left hand rule, magnetic force on electrons will be downward.