A parallel plate capacitor is filled with a dialectric whose dialectric constant is K, increasing its capacitance from C_1 to KC_1. A second capacitor with capacitance C_2 is then connected in series with the first, reducing the net capacitance back to C_1.
What is C_2? Express your answer in terms of K, C_1 and constants.
This solution provides step by step calculations for finding capacitance in a parallel plate capacitor.