Introduction to Electrodynamics
4th Edition
ISBN: 9781108420419
Author: David J. Griffiths
Publisher: Cambridge University Press
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Textbook Question
Chapter 2.1, Problem 2.1P
(a) Twelve equal charges,q, arc situated at the corners of a regular 12-sided polygon (for instance, one on each numeral of a clock face). What is the net forceon a test charge Q at the center?
(b) Suppose one of the 12 q’s is removed (the one at “6 o’clock”). What is the forceon Q? Explain your reasoning carefully.
(c) Now 13 equal charges,q, are placed at the corners of a regular 1 3-sidedpolygon. What is the force on a test charge Q at the center?
(d) If one of the 13 q‘s is removed, what is the force on Q? Explain your reasoning.
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There are twelve equal charges, q, situated at the corners of a regular 12-sided polygon (for instance, one on each numeral of the face of a clock). What is the net force on a test charge Q at the center? Now suppose one of the 12 q’s is removed (the one at “6o’clock”). What is the force on Q? Be sure to explain your reasoning.
(a) Twelve equal charges, q, are situated at the corners of a regular twelve-sided
polygon (for instance, one on each numeral of a clock face). What is the net
force on a test charge Q at the center?
(b) Suppose one of the 12 q charges is removed (the one at "6 o'clock"). What is
the force on Q? Explain your reasoning carefully.
(c) Now let 13 equal charges, q, be situated at the corners of a regular 13-sided
polygon. What is the force on a test charge Q at the center?
(d) If one of the 13 q charges is removed, what is the force on Q? Explain your
reasoning.
(a) Twelve equal charges, q, are situated at the corners of a regular 12-sided poly-
gon (for instance, one on each numeral of a clock face). What is the net force
on a test charge Q at the center?
(b) Suppose one of the 12 q's is removed (the one at "6 o'clock"). What is the force
on Q? Explain your reasoning carefully.
Chapter 2 Solutions
Introduction to Electrodynamics
Ch. 2.1 - (a) Twelve equal charges,q, arc situated at the...Ch. 2.1 - Find the electric field (magnitude and direction)...Ch. 2.1 - Find the electric field a distance z above one end...Ch. 2.1 - Prob. 2.4PCh. 2.1 - Prob. 2.5PCh. 2.1 - Find the electric field a distance z above the...Ch. 2.1 - Find the electric field a distance z from the...Ch. 2.2 - Use your result in Prob. 2.7 to find the field...Ch. 2.2 - Prob. 2.9PCh. 2.2 - Prob. 2.10P
Ch. 2.2 - Use Gauss’s law to find the electric field inside...Ch. 2.2 - Prob. 2.12PCh. 2.2 - Prob. 2.13PCh. 2.2 - Prob. 2.14PCh. 2.2 - A thick spherical shell carries charge density...Ch. 2.2 - A long coaxial cable (Fig. 2.26) carries a uniform...Ch. 2.2 - Prob. 2.17PCh. 2.2 - Prob. 2.18PCh. 2.2 - Prob. 2.19PCh. 2.3 - One of these is an impossible electrostatic field....Ch. 2.3 - Prob. 2.21PCh. 2.3 - Find the potential a distance s from an infinitely...Ch. 2.3 - Prob. 2.23PCh. 2.3 - Prob. 2.24PCh. 2.3 - Prob. 2.25PCh. 2.3 - Prob. 2.26PCh. 2.3 - Prob. 2.27PCh. 2.3 - Prob. 2.28PCh. 2.3 - Prob. 2.29PCh. 2.3 - Prob. 2.30PCh. 2.4 - Prob. 2.31PCh. 2.4 - Prob. 2.32PCh. 2.4 - Prob. 2.33PCh. 2.4 - Find the energy stored in a uniformly charged...Ch. 2.4 - Prob. 2.35PCh. 2.4 - Prob. 2.36PCh. 2.4 - Prob. 2.37PCh. 2.5 - A metal sphere of radius R, carrying charge q, is...Ch. 2.5 - Prob. 2.39PCh. 2.5 - Prob. 2.40PCh. 2.5 - Prob. 2.41PCh. 2.5 - Prob. 2.42PCh. 2.5 - Prob. 2.43PCh. 2.5 - Prob. 2.44PCh. 2.5 - Prob. 2.45PCh. 2.5 - If the electric field in some region is given (in...Ch. 2.5 - Prob. 2.47PCh. 2.5 - Prob. 2.48PCh. 2.5 - Prob. 2.49PCh. 2.5 - Prob. 2.50PCh. 2.5 - Prob. 2.51PCh. 2.5 - Prob. 2.52PCh. 2.5 - Prob. 2.53PCh. 2.5 - Prob. 2.54PCh. 2.5 - Prob. 2.55PCh. 2.5 - Prob. 2.56PCh. 2.5 - Prob. 2.57PCh. 2.5 - Prob. 2.58PCh. 2.5 - Prob. 2.59PCh. 2.5 - Prob. 2.60PCh. 2.5 - Prob. 2.61P
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