5th Edition

ISBN: 9780321976444

Author: James S. Walker

Publisher: PEARSON

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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 particle…

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Textbook Question

Chapter 20, Problem 94GP

BIO Cell Membranes and Dielectrics Many cells in the body have a cell membrane whose inner and outer surfaces carry opposite charges, just like the plates of a parallel-plate capacitor. Suppose a typical cell membrane has a thickness of 8.1 × 10^-9 m, and its inner and outer surfaces carry charge densities of −0.58 × 10^-3 C/m², and +0.58 × 10^-3C/m², respectively. In addition, assume that the material in the cell membrane has a dielectric constant of 5.5. (a) Find the direction and magnitude of the electric field within the cell membrane. (b) Calculate the potential difference between the inner and outer walls of the membrane, and indicate which wall of the membrane has the higher potential.

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Chapter 20, Problem 93GP

Chapter 20, Problem 95GP

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Chapter 20 Solutions

Physics (5th Edition)

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