TAILIEUCHUNG - Introduction to Electric Circuits

An Introduction to Electric Circuits is essential reading for first year students of electronics and electrical engineering who need to get to grips quickly with the basic theory. This text is a comprehensive introduction to the topic and, assuming virtually no knowledge, it keeps the mathematical content to a minimum. As with other textbooks in the series, the format of this book enables the student to work at their own pace. It includes numerous worked examples throughout the text and graded exercises, with answers, at the end of each section | Ray Powell ARNOLD ESSENTIAL ELECTRONICS INTRODUCTION TO ELECTRIC CIRCUITS First published in Great Britain 1995 by Arnold a member of the Hodder Headline Group. 338 Euston Road London NW1 3BH 1995 Ray Powell All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means electronically or mechanically including photocopying recording or any information storage or retrieval system without cither prior permission in writing from the publisher or a licence permitting restricted copying. In the United Kingdom such licences are issued by the Copyright Licensing Agency of 90 Tottenham Court Road London W1P 9HE. Whilst the advice and information in this book is believed to be true and accurate at the date of going to press neither the authors nor the publisher can accept any legal responsibility or liability for any errors or omissions that may be made. British Library Cataloguing in Publication Data A catalogue record for this book is available from the British Library Library of Congress Cataloging-in-Publication Data A catalog record for this book is available from the Library of Congress ISBN 0340 63198 8 2345 Typeset in 10Ì 13Ỉ Times by Wearset Boldon Tyne and Wear. Printed and bound in Great Britain by J w Arrowsmith Ltd Bristol. Contents Preface xi Acknowledgements xiii Chapter 1 Units and dimensions Introduction 1 The Systems International d Unites 1 Dimensional analysis 4 Multiples and submultiples of units 6 Self-assessment test 8 Problems 8 Chapter 2 Electric circuit elements Electricity 10 Electric circuits 11 Circuit elements 11 Lumped parameters 34 Energy stored in circuit elements 35 Power dissipated in circuit elements 36 Self-assessment test 37 Problems 38 Chapter 3 DC circuit analysis Introduction 40 Definition of terms 40 Kirchhoffs current law 42 Kirchhoff s voltage law 42 The Principle of Superposition 45 Thevenin s theorem 48

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