Author Question: An electron has an initial velocity to the south but is observed to curve upward as the result of a ... (Read 198 times)

vicky · **on:** Jul 29, 2018

An electron has an initial velocity to the south but is observed to curve upward as the result of a magnetic field. This magnetic field must have a component

A) to the west.
B) to the east.
C) upward.
D) downward.
E) to the north.

Question 2

A plastic rod is charged up by rubbing a wool cloth, and brought to an initially neutral metallic sphere that is insulated from ground. It is allowed to touch the sphere for a few seconds, and then is separated from the sphere by a small distance.

After the rod is separated, the rod A) is repelled by the sphere.
B) is attracted to the sphere.
C) feels no force due to the sphere.