The force between two charges is 120 N. If the distance between the charges is doubled, the force will be________________?
Correct answer: B. 30 N
- A. 60 N
- B. 30 N
- C. 40 N
- D. 15 N
Explanation
Coulomb force varies inversely as the square of distance. Doubling the distance makes the force one-fourth, so 120/4 = 30 N.
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