Eletromagnetismo 7. If it collapses to a drop of radius 1 mm, what is the change of its electrostatic energy? Solution: Noting that p is a function of only the radius r, we can take a concentric spherical surface of radius r as the Gaussian surface in accordance with the symmetry requirement. The charge dq on this area element will produce at the point P an electric field which is approximately that due to a uniformly charged infinite plate, namely, where n is a unit vector normal to ds in the outward direction. Hence, if we take E2p as the electric field at P due to all the charges on the spherical surface except the element ds, we must have Therefore, As P is close to ds, E2p may be considered as the field strength at ds due to the charges of the spherical surface.

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First published Reprinted , , , , , , Major American Universities Ph. All rights reserved. This book, or parts thereof, may not be reproduced in any form or by any means, electronic or mechanical, including photocopying, recording or any information storage and retrieval system now known or to be invented, without written permission from the Publisher. For photocopying of material in this volume, please pay a copying fee through the Copyright Clearance Center, Inc.

In this case permission to photocopy is not required from the publisher. ISBN In each area the problems span a wide spectrum of topics while many problems overlap several areas.

The problems themselves are remarkable for their versatil- ity in applying the physical laws and principles, their uptodate realistic situations, and their scanty demand on mathematical skills. Many of the problems involve order of magnitude calculations which one often requires in an experimental situation for estimating a quantity from a simple model.

The solutions as presented generally just provide a guidance to solving the problems, rather than step by step manipulation, and leave much to the students to work out for themselves, of whom much is demanded of the basic knowledge in physics.

Thus the series would provide an invaluable complement to the textbooks. In editing, no attempt has been made to unify the physical terms, units and symbols.

Great v vi Preface pains has been taken to trace the logical steps from the first principles to the final solutions, frequently even to the extent of rewriting the entire solution. In addition, a subject index has been included to facilitate the location of topics. These editorial efforts hopefully will enhance the value of the volume to the students and teachers alike. Working out problems is an essential and important aspect of the study of Physics.

Major American University Ph. Qualifying Questions and Solutions is a series of books which consists of seven volumes. The subjects of each volume and the respective referees in parentheses are as follows: 1. Thermodynamics and Statistical Physics Zheng Jiu-ren 6. The problems have been carefully chosen from problems, of which some came from the China—U. Physics Examination and Application Pro- gram, some were selected from the Ph. Indeed, we ven- ture to opine that the problems, as a whole, embody to come extent the characteristics of American science and culture, as well as the philosophy underlying American education.

As many as a hundred teachers and graduate students took part in this time-consuming task. A total of problems makes up thie volume of five parts: electrostat- ics , magnetostatic and quasi-stationary electromagnetic fields , circuit analysis 90 , electromagnetic waves 67 , and relativity, particle- field interactions In scope and depth, most of the problems conform to the undergrad- uate physics syllabi for electromagnetism, circuit analysis and electrody- namics in most universities.

However, many of them are rather profound, sophisticated and broad-based. In particular, problems from American uni- versities often fuse fundamental principles with the latest research activities. Thus the problems may help the reader not only to enhance understanding in the basic principles, but also to cultivate the ability of solving practical problems in a realistic environment. International units are used whenever possible, but in order to conform to some of the problems, Gaussian units are also used.

This in fact would give the student broader training and wider experience. This volume is the result of collective efforts of 34 physicists involved in working out and checking of the solutions, among them Zheng Dao-chen, Hu You-qiu, Ning Bo, Zhu Xue-liang, and Zhao Shu-ping. Electrostatic Field in a Conductor 3. Electrostatic Field in a Dielectric Medium 4. Magnetic Field of Currents 2. Electromagnetic Induction 3. Basic Circuit Analysis Electric and Magnetic Circuits Analog Circuits Digital Circuits Nuclear Electronics Plane Electromagnetic Waves 2.

The Lorentz Transformation 2. Electromagnetic Field of a Charged Particle 3. Motion of a Charged Particle in Electromagnetic Field 4.

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## Problems And Solutions On Electromagnetism

Major American Universities Ph. On a positive note: Learn more about Amazon Prime. Customers who viewed this item also viewed. Fernando rated it it was amazing May 12, This book only helped me to review statics. As for the Jackson problems, one will be lucky to find any help at all too bad. To see what your friends thought of this book, please sign up. Falevian added it Jul 28, Do not buy this book unless you want a basic refresher on electromagnetics.

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## Problems and Solutions on Electromagnetism

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