12. A current that changes as I=11-22-t, where the current is in milliamperes and the time is in seconds, generates a back emf of 45 mV in a solenoid. What is the energy stored in the solenoid at time t = 1.93 sec? A. 1 mJ B. 2 mJ C. 3 mJ D. 4 mJ E. 5 mJ

12. A current that changes as I=11-22-t, where the current is in milliamperes and the time is in seconds, generates a back emf of 45 mV in a solenoid. What is the energy stored in the solenoid at time t = 1.93 sec? A. 1 mJ B. 2 mJ C. 3 mJ D. 4 mJ E. 5 mJ

Physics for Scientists and Engineers with Modern Physics

10th Edition

ISBN:9781337553292

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter31: Inductance

Section: Chapter Questions

Problem 4P

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Question

12. A current that changes as I=11-22-t, where the current is in milliamperes and the time is in
seconds, generates a back emf of 45 mV in a solenoid. What is the energy stored in the solenoid at
time t = 1.93 sec?
A. 1 mJ
B. 2 mJ
C. 3 mJ
D. 4 mJ
E. 5 mJ

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