A parallel plate capacitor has a measured capacitance of 1.0 pF, and is charged to 2.0 μC, then disconnected from the power supply. The space between the plates is then filled with a certain dielectric material with a dielectric constant of K = 4.0. What is the resulting capacitance and the stored electric potential energy?
A) 4.0 pF and 1.0 J
B) 0.25 pF and 0.5 J
C) 4.0 pF and 0.5 J
D) 4.0 pF and 4.0 J
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