Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 25, Problem 29P
To determine
The maximum gauge of the copper wire.
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An iron wire has a cross - sectional area of 5.00 x 10-6 m2.Carry out steps (a) through (e) to compute the drift speed ofthe conduction electrons in the wire. (a) How many kilogramsare there in 1 mole of iron? (b) Starting with the density of ironand the result of part (a), compute the molar density of iron(the number of moles of iron per cubic meter). (c) Calculatethe number density of iron atoms using Avogadro’s number.(d) Obtain the number density of conduction electrons giventhat there are two conduction electrons per iron atom. (e) Ifthe wire carries a current of 30.0 A, calculate the drift speed ofconduction electrons.
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A rectangular block of copper has sides of length 10. cm, 20. cm,and 40. cm. If the block is connected to a 6.0 - V source acrosstwo of its opposite faces, what are (a) the maximum currentand (b) the minimum current the block can carry?
Chapter 25 Solutions
Physics for Scientists and Engineers
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- A coil of Nichrome wire is 25.0 m long. The wire has adiameter of 0.400 mm and is at 20.0°C. If it carries acurrent of 0.500 A, what are (a) the magnitude of theelectric field in the wire, and (b) the power delivered toit? (c) What If? If the temperature is increased to 340°Cand the voltage across the wire remains constant, whatis the power delivered?arrow_forwardTaking R = 1.00 kΩ and ε = 250 V in Figure P27.19, determine the direction andmagnitude of the current in the horizontal wire between a and e.Figure P27.19arrow_forwardConsider a power plant is located 60 km away from a residential area uses Q-gauge (A=42.40mm2) wire ofcopper to transmit power at a current of I = 100.00 A.How much more power is dissipated in the copper wires than it would be in superconducting wires?arrow_forward
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