Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)

Published by Pearson
ISBN 10: 0133942651
ISBN 13: 978-0-13394-265-1

Chapter 23 - The Electric Field - Conceptual Questions: 6

Answer

The electric filed at the center of the straw is zero.

Work Step by Step

From the symmetry of the system or straw, every $E$ at the center due to a strip at the periphery is cancelled by $-E$ due to the opposite strip on the periphery . Every field gets cancelled at the center from the cylindrical symmetry. Hence,the electric filed at the center of the straw is zero.
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