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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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Question by Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014, Reprinted by permission of Pearson Education Inc., New York.
Problem 35
Q

For the transmission of electric power from power plant to home, as depicted in Fig. 21–25, where the electric power sent by the plant is 100 kW, about how far away could the house be from the power plant before power loss is 50%? Assume the wires have a resistance per unit length of 5×10−5  Ω/m5 \times 10^{-5} \; \Omega/\textrm{m}.

The transmission of electric power from power plants to homes makes use of transformers at various stages.
Figure 21-25.
A
6×109 m6 \times 10^9 \textrm{ m}
Giancoli 7th Edition, Chapter 21, Problem 35 solution video poster
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COMMENTS
By mdally432 on Wed, 4/17/2024 - 2:36 AM

I worked this out and got it wrong using these steps. the resistor (R) was given as 4.0 * 10^-5 ohms/m. The Power was given to be 100 kW. All the other numbers were the same. My answer for the distance was 3.6 * 10^9 m

By mark.markmyers on Tue, 7/23/2024 - 6:55 PM

Hi there, I calculated the distance for your problem and got 7.2*10^9 m. Was that the right answer?

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