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Physics / College Physics 1 / Chapter 20 / Problem 70

College Physics | 1st Edition | ISBN: 9781938168000 | Authors: Paul Peter Urone, Roger Hinrichs

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Chapter 20, Problem 70

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QUESTION:

Problem 70PE

Unreasonable Results (a) What current is needed to transmit 1.00 × 102 MW of power at 10.0 kV? (b) Find the resistance of 1.00 km of wire that would cause a 0.0100% power loss. (c) What is the diameter of a 1.00-km-long copper wire having this resistance? (d) What is unreasonable about these results? (e) Which assumptions are unreasonable, or which premises are inconsistent?

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QUESTION:

Problem 70PE

Unreasonable Results (a) What current is needed to transmit 1.00 × 102 MW of power at 10.0 kV? (b) Find the resistance of 1.00 km of wire that would cause a 0.0100% power loss. (c) What is the diameter of a 1.00-km-long copper wire having this resistance? (d) What is unreasonable about these results? (e) Which assumptions are unreasonable, or which premises are inconsistent?

ANSWER:

Solution 70PE

a.) The current needed is 0.010 mA

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