A stream of electrons is projected horizontally to the right. A straight conductor carrying a current is supported parallel to the electron steam an above it. If the current in the conductor is from left to right, what will be the effect on the electron stream?

Options

A. The electron stream will be pulled upward
B. The correct stream will be pulled downward
C. The electron stream will be retarded
D. The electron stream will be speeded up toward the right

Answer

B

Explanation

(b) Current due to a stream of electrons will be in a direction
opposite to the direction of current in the straight conductor
which is held parallel above the stream of electrons. The two
currents are in opposite directions and hence they will repel.
So, the stream of electrons is pulled downward.