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Giancoli 7th Edition textbook cover
Giancoli's Physics: Principles with Applications, 7th Edition
20
Magnetism
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20-3: Force on Electric Current in Magnetic Field
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20-4: Force on Charge Moving in Magnetic Field
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20-5 and 20-6: Magnetic Field of Straight Wire, Force between Two Wires
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20-7: Solenoids and Electromagnets
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20-8: Ampère's Law
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20-9 and 20-10: Torque on Curent Loop, Motors, Galvanometers
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20-11: Mass Spectrometer
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20-12: Ferromagnetism, Hysteresis
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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 48
Q

You have 1.0 kg of copper and want to make a practical solenoid that produces the greatest possible magnetic field for a given voltage. Should you make your copper wire long and thin, short and fat, or something else? Consider other variables, such as solenoid diameter, length, and so on. Explain your reasoning.

A
The wire should be short and fat. See video for explanation.
Giancoli 7th Edition, Chapter 20, Problem 48 solution video poster
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