A parallel plate capacitor with a plate area of 20.0 cm2 and plate separation of 8.00 mm is connected to a constant potential difference of 5.00 V. A dielectric with a dielectric constant of 4.00 is inserted between the plates.
a) What is the energy stored in the capacitor?
b) The capacitor is disconnected from the battery and the dielectric is removed from the interior of the capacitor. What is the new energy of the capacitor now?
c) What does this imply in regards to work? Where does this work come from or went into?
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