Practice Quiz

CLEP Chemistry

Category - Multiple Choice

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Which of the following isn’t true about electrostatic force?
  1. It measures the forces between two charges
  2. The magnitude of the force depends on the distance between two charges
  3. As electrons get closer, the forces that repel them from each other weaken
  4. As electrons get closer, the forces that repel them from each other increase
  5. Electrostatic force can be calculated using Coulomb’s Law
Explanation
Answer: C. Coulomb’s Law is used to calculate electrostatic force between two charges, thus A and E are true. The law states that:

F=ke * (q1)(q2)/(r2) where F is force, ke is Coulomb’s constant, q1 and q2 are the magnitudes of the charges and r is the distance between the charges (meaning B is true because distance is a factor). As r decreases, F increases because dividing by a smaller number always yields a larger result. Thus C is false and D is true.
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