University Physics with Modern Physics (14th Edition)

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

Chapter 30 - Inductance - Problems - Exercises - Page 1014: 30.29

Answer

15.3 V.

Work Step by Step

Closing S1 while S2 is open connects the RL combination in series with the emf source. Apply Kirchhoff’s loop rule: $\epsilon-iR-L\frac{di}{dt}=0$. $$iR=v_{ab}=\epsilon -L\frac{di}{dt}=18.0V-(0.380H)(7.20A/s)=15.3V$$
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