Question
As shown in the figure below, two metal balls are suspended and a negatively charged rod is brought close to them.
1. If the two balls are in contact with each other what will be the charges on each ball?
2. Explain how the balls get these charges.
3. What will happen to the charge on the second ball (i.e., the ball further away from the rod) if it is momentarily grounded while the rod is still there?
4. If (instead of grounding) the second ball is moved away and then the rod is removed from the first ball, will the two balls have induced charges? If yes, what will be the charges? If no, why not?
Question Image
1. The left ball will be positive, and the right ball will be negative.
2. Electron's in the rod repel electrons in the left ball.
3. The right ball will become neutral.
4. Yes. The left ball will be positively charged, whereas the right ball will be negatively charged.
Solution Video

# OpenStax College Physics for AP® Courses Solution, Chapter 18, Problem 19 (Test Prep for AP® Courses) (1:33) 