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Giancoli's Physics: Principles with Applications, 7th Edition
21
Electromagnetic Induction and Faraday's Law
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21-1 to 21-4: Faraday's Law of Induction
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21-5: Generators
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21-6: Back EMF and Torque
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21-7: Transormers
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21-10: Inductance
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21-11: Magnetic Energy Storage
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21-12: LR Circuit
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21-13: AC Circuits and Reactance
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21-14: LRC Circuits
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21-15: Resonance in AC Circuits
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Question by Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014, Reprinted by permission of Pearson Education Inc., New York.
Problem 10
Q

A circular loop in the plane of the paper lies in a 0.65-T magnetic field pointing into the paper. The loop’s diameter changes from 20.0 cm to 6.0 cm in 0.50 s. What is

  1. the direction of the induced current,
  2. the magnitude of the average induced emf, and
  3. the average induced current if the coil resistance is 2.5  Ω2.5 \; \Omega?
A
  1. Clockwise
  2. 3.7×10−2 V3.7 \times 10^{-2} \textrm{ V}
  3. 1.5×10−2 A1.5 \times 10^{-2} \textrm{ A}
Giancoli 7th Edition, Chapter 21, Problem 10 solution video poster
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