Externet Posted July 25, 2009 Share Posted July 25, 2009 A plain bar magnet --------------------------------------------------------------------------------- N................................................................................................S --------------------------------------------------------------------------------- above, will produce a given field at point x below : ................................................X If the ends of the magnet body are bifurcated by slits "===" : --------------------------------------------------------------------------------- N.................................................................................................S ===......................................................................................=== N.................................................................................................S ---------------------------------------------------------------------------------- Each end will have two same polar N-N , and S-S. That will make the lines of force at the ends, to diverge, by repulsion to each other. Will the same point X then experience a larger, equal or greater field ? ..................................................X In other words, will the magnetic field reach farther or be stronger by slitting the ends of a bar magnet? [ignore the dots on the sketch] Miguel Link to comment Share on other sites More sharing options...
Externet Posted July 31, 2009 Author Share Posted July 31, 2009 Obviously, the post above has to be very poorly expressed and unclear to receive no responses. Am sorry. Allow me to ask from a totally different angle: What magnet shape would project its lines of force further away? A bar, a horseshoe, a plate, a cube, a slitted, a sphere, ... Link to comment Share on other sites More sharing options...
Klaynos Posted July 31, 2009 Share Posted July 31, 2009 You don't give enough information to answer really, the size and distance away of the point matter, from a 'large' distance away any dipole with the poles at eitehr ends will look the same... So depending how far away teh x is will depend whetehr the fields look different or not. As for your last question something with the metal between teh two poles (e.g. a bar) will have larger distant fields on average than something like a horseshoe I think.... but not 100% sure of that. Link to comment Share on other sites More sharing options...
Externet Posted August 1, 2009 Author Share Posted August 1, 2009 Thanks, Klaynos. It was more qualitative and behavioral than specific; but can put some simple generic figures if helps. A 10cm x 1cm x 1cm magnet bar suspended in space produces a 'small' amount of magnetic field at a point X distant 100cm perpendicular from its center. Its lines of force 'exit/enter' the ends of the bar magnet describing a certain undisturbed and smooth typical curvature. Its lines of force reach point X faintly being that much distant. What manipulation of the magnet / lines of force could increase the magnitude of the magnetic field at X. See the figure here: http://www.acesinternational.org/images/32NE0014.gif How 'smooth' the lines of force are sketched entering/exiting the ends of the magnet. See : http://www.bbc.co.uk/schools/ks3bitesize/science/images/sci_dia_75.gif how the lines of force are exiting/entering almost perpendicular to the magnet end because of the repulsive field nearby. Is that sharper bend yielding/projecting more lines of force at X ? It is basic that I express properly my question; please let me know if it needs more improvement. Miguel Link to comment Share on other sites More sharing options...
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