Return to the Chapter-Opening Question, page 559, and answer it again now. Try to explain why you may have answered differently the first time.
CHAPTER-OPENING QUI STION—Guess now!
Two identical tiny spheres have the same electric charge. If the electric charge on each of them is doubled, and their separation is also doubled, the force each exerts on the other will be
- (a) half.
- (b) double.
- (c) four times larger.
- (d) one-quarter as large.
- (e) unchanged.
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