Question

An insulating loop has one side charged positively and the other side charged negatively. An electron is placed in the middle of the loop. What would be the direction of the net force on the electron due to the charges in the ring?

• A. Toward the top of the loop
• B. Toward the right of the loop
• C. Toward the left of the loop
• D. There is no net force on the loop

Answer 1

Answer: (B)

Toward the right of the loop

The positive charges on the right would attract the electron placed at the center and hence would exert force towards right.

The negative charges on the left would repel the electron placed at the center and hence would exert force towards right.

Hence the net force exists towards right, and correct answer is option B.