# Calculate the steady state temperature of the

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

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...
View Full Document

## This note was uploaded on 12/04/2010 for the course ECE 134 taught by Professor York during the Fall '08 term at UCSB.

Ask a homework question - tutors are online