Electric Force in a Dielectric Medium
The magnitude of the electric force between two point charges in a vacuum is 3.6 × 10^-5 N. If the vacuum is replaced by a medium with a relative permittivity of 4.0, what is the new magnitude of the electric force?
A
1.8 × 10^-5 N
B
9.0 × 10^-6 N
C
1.44 × 10^-4 N
D
3.6 × 10^-5 N
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