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Question: A parallel plate capacitor with vacuum between the circular plates has a capacitance of 323 nF. Each plate has a diameter of 20 cm.

a. 100 V is applied between the plates, how much charge is there on each plate?

b. How much energy is stored in the capacitor in part a?

c. What is the distance between the plates?

d. The space between the plates is now filled with Pyrex (Κ = 4.7) (assume that the battery is disconnected), what is the new capacitance?

e. If the battery was connected when the space between the plats filled with Pyrex, how much charge is now on each plate?

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