Energy Stored in Electric Fields: The energy stored in a capacitor is UE = CAVC² We can understand this since it takes energy to push charges of the same sign together on each plate. However, we can also think of this energy as being stored in the electric field created between the plates. 3. Consider a air-filled parallel plate capacitor with plates of area A and gap width H. There is a voltage difference AVC between the plates. For a parallel plate capacitor the capacitance is a. UE = CAV² C = € A H UE = UE/Volume = H and AVC = EH. Substitute these the expressions for C and AVC into the expression for the energy stored in the capacitor to write the energy in terms of the electric field E. de vioolavad A Ë b. Divide your expression by the volume AH of the capacitor to write the electric energy density in terms fo the electric field E. IW dans er h nounsson AVC

Energy Stored in Electric Fields: The energy stored in a capacitor is UE = CAVC² We can understand this since it takes energy to push charges of the same sign together on each plate. However, we can also think of this energy as being stored in the electric field created between the plates. 3. Consider a air-filled parallel plate capacitor with plates of area A and gap width H. There is a voltage difference AVC between the plates. For a parallel plate capacitor the capacitance is a. UE = CAV² C = € A H UE = UE/Volume = H and AVC = EH. Substitute these the expressions for C and AVC into the expression for the energy stored in the capacitor to write the energy in terms of the electric field E. de vioolavad A Ë b. Divide your expression by the volume AH of the capacitor to write the electric energy density in terms fo the electric field E. IW dans er h nounsson AVC

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter7: Electric Potential

Section: Chapter Questions

Problem 62P: A long cylinder of aluminum of radius R meters is charged so that it has a uniform charge per unit...

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