Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 22 - Think and Explain: 52

Answer

When the DVD is wiped, it becomes charged by contact and friction.

Work Step by Step

The charged DVD induces an opposite charge on the closer side of a dust particle (i.e., it polarizes the dust particle). The charge on the DVD then attracts the polarized dust particle. This is discussed on page 416 and shown in Figures 22.12 and 22.13.
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