University Physics with Modern Physics (14th Edition)

Published by Pearson
ISBN 10: 0321973615
ISBN 13: 978-0-32197-361-0

Chapter 30 - Inductance - Problems - Discussion Questions - Page 1013: Q30.15


See explanation.

Work Step by Step

If you attempt to reduce the current to zero instantaneously, according to equation 30.7, the self-induced emf in the circuit would be “infinite” (in practice, just really high), causing an arc to appear across the switch that is opening. It is not physically possible to stop the current instantaneously.
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