MCAT Physics Question 62: Answer and Explanation
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Question: 62
2. Question below refers to the figure below, in which F represents the electrostatic force exerted on charged particle S by charged particle R.
If the distance between the centers of the spheres is halved, the magnitude of the force on S due to R will be:
- A.
- B.
- C. 2F.
- D. 4F.
Correct Answer: D
Explanation:
The force is inversely proportional to r2. Cutting the distance in half will therefore multiply the force by 22, making it four times its original value: