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Unformatted text preview: late the steady-state temperature of the tungsten filament in a 60 Watt light bulb during normal operation in a room-temperature environment, assuming that the effective surface area of radiation is a cylinder of length and diameter and emissivity . A long horizontal Copper wire carries a current I and is oriented such that it flows perpendicular to the Earth's magnetic field B as shown below. The wire has a 1 mm diameter and a linear mass density of mg = 0.1 kg/m. If the Earth's magnetic field is : a. What current would be required to levitate the wire? b. The maximum DC current density that can be safely supported by copper wires is . Will it be possible for the wire in this problem to support the necessary current to observe magnetic levitation? The c...
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This note was uploaded on 12/04/2010 for the course ECE 134 taught by Professor York during the Fall '08 term at UCSB.
- Fall '08