A parallel plate capacitor has a capacitance of with air between the plates. The capacitor is connected

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A parallel plate capacitor has a capacitance of with air between the plates. The capacitor is connected to a 12-V battery and charged. The battery is then removed. When a dielectric is placed between the plates, a potential difference of 5.0 V is measured across the plates.
(a) What is the dielectric constant of the material?
(b) What happened to the energy storage in the capacitor: (1) it increased, (2) it decreased, or (3) it stayed the same?
(c) By how much did the energy storage of this capacitor change when the dielectric was inserted?
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College Physics

ISBN: 978-0321601834

7th edition

Authors: Jerry D. Wilson, Anthony J. Buffa, Bo Lou

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