Electric force between two point charges in air or vacuum is F. If we replace air or vacuum by an insulator (dielectric) of relative permitivity Cr the force between the charges will_______________?
Correct answer: A. decrease
- A. decrease
- B. increase
- C. remain constant
- D. depends upon composition of dielectricEngineering & Technology
Explanation
In a dielectric, Coulomb force becomes F/εr relative to its value in vacuum, so it decreases when the relative permittivity is greater than one. The force does depend on the dielectric's composition through εr, but decrease is the intended result.
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