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Giancoli 7th Edition textbook cover
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 66
Q
  1. What is the rms current in an LR circuit when a 60.0-Hz 120-V rms ac voltage is applied, where R=2.80 kΩR = 2.80 \textrm{ k}\Omega and L=350 mHL = 350 \textrm{ mH}?
  2. What is the phase angle between voltage and current?
  3. How much power is dissipated?
  4. What are the rms voltage readings across R and L?
A
  1. 4.3×10−2 A4.3 \times 10^{-2} \textrm{ A}
  2. 2.7∘ (positive means current lags voltage)2.7^\circ \textrm{ (positive means current lags voltage)}
  3. 5.1 W5.1 \textrm{ W}
  4. resistor: 120 V120 \textrm{ V}, inductor: 5.6 V5.6 \textrm{ V}
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