PHYSICS · Single correct · AP · Physics C: Electricity and Magnetism · Electric Charges Fields and Gauss's Law · Electric Charges Fields and Gauss's Law
Problem
Two point charges, +3.0μC and −2.0μC, are separated by 0.050m.
What is the magnitude of the electrostatic force between them when the space is filled with water of relative permittivity k=80?
(a) 6.7×10−2N
(b) 2.7×10−1N
(c) 1.3×10−2N
(d) 3.4×10−3N