24.26 •• A parallel-plate vacuum capacitor has 8.38 J of energy stored in it. The separation between the plates is 2.30 mm. If the separation is decreased to 1.15 mm, what is the energy stored (a) if the capacitor is disconnected from the potential source so the charge on the plates re- mains constant, and (b) if the capacitor remains connected to the potential source so the potential difference between the plates remains constant?

24.26 •• A parallel-plate vacuum capacitor has 8.38 J of energy stored in it. The separation between the plates is 2.30 mm. If the separation is decreased to 1.15 mm, what is the energy stored (a) if the capacitor is disconnected from the potential source so the charge on the plates re- mains constant, and (b) if the capacitor remains connected to the potential source so the potential difference between the plates remains constant?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter20: Electric Potential And Capacitance

Section: Chapter Questions

Problem 79P

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Concept explainers

Dielectric Constant Of Water

Water constitutes about 70% of earth. Some important distinguishing properties of water are high molar concentration, small dissociation constant and high dielectric constant.

Electrostatic Potential and Capacitance

An electrostatic force is a force caused by stationary electric charges /fields. The electrostatic force is caused by the transfer of electrons in conducting materials. Coulomb’s law determines the amount of force between two stationary, charged particles. The electric force is the force which acts between two stationary charges. It is also called Coulomb force.

Question

Note: Please use paper and black ink thanks.

24.26 •• A parallel-plate vacuum capacitor has 8.38 J of energy stored
in it. The separation between the plates is 2.30 mm. If the separation is
decreased to 1.15 mm, what is the energy stored (a) if the capacitor is
disconnected from the potential source so the charge on the plates re-
mains constant, and (b) if the capacitor remains connected to the potential
source so the potential difference between the plates remains constant?

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