Electrical Engineering: Principles & Applications (6th Edition)

Published by Prentice Hall
ISBN 10: 0133116646
ISBN 13: 978-0-13311-664-9

Chapter 1 - 1.6 - Problems - Introduction to Circuit Elements: P1.55

Answer

a. $R=20\Omega$ b. $R=2.5\Omega$

Work Step by Step

Given $R=\rho\times\frac{L}{A}$ a. If length is doubled, resistance doubles. b. If diameter doubles, radius doubles, so area is divided by 4.
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