Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 20 - Magnetism - Problems - Page 586: 52

Answer

The new torque is 0.88 of the original torque.

Work Step by Step

Use equation 20–10 to find the torque produced. $$\tau=NIABsin\theta$$ The output torque is proportional to the current. If the current I is reduced by $12\%$, the output torque is reduced by $12\%$. In other words, the new torque is 0.88 of the original torque.
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