Physics Help Forum Infinite Conductor within Infinite Conductor - Current Density between

 Electricity and Magnetism Electricity and Magnetism Physics Help Forum

 Feb 14th 2010, 03:02 PM #1 Junior Member   Join Date: Feb 2010 Posts: 12 Infinite Conductor within Infinite Conductor - Current Density between
 Feb 15th 2010, 12:30 AM #2 Junior Member   Join Date: Feb 2010 Posts: 12 for question 3 I honestly have no idea where to start..I write down biot-savart law and I have no clue from there on lol for question 4) I know for an infinite conductor H = (I/2pi(rho))(aphi) But I'm not sure how it works for different radiuses and what to do with the aphi (do I need to figure out a direction?) Thanks!
 May 3rd 2010, 01:12 AM #3 Senior Member   Join Date: Sep 2009 Location: india Posts: 409 magnetic field within the solid cylinder at any arbitrary distance r from centre can be found from ampere law. now magnetic energy density=1/(2 mew zero) B^2 this is to be integrated within required limits. the volume element may be chosen as r dr dtheta dz where z is the height and theta is the polar angle- ie. a cylindrical co ordinate system. hope this helps...

 Tags conductor, current, density, infinite

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