query: what is the specific cause of permanent magnetism
positive_passages.docid: 204
positive_passages.text: How does a magnet work?
negative_passages.docid: 128759
negative_passages.text: Why don't we define potential due to a magnetic field?
negative_passages.docid: 75296
negative_passages.text: How long does a permanent magnet remain a magnet?
negative_passages.docid: 48013
negative_passages.text: What is the mechanism by which magnetic fields do work?
negative_passages.docid: 28177
negative_passages.text: What causes the permittivity and permeability of vacuum?
negative_passages.docid: 11821
negative_passages.text: Shielding magnetic field without mu-metal
negative_passages.docid: 34257
negative_passages.text: No magnetic field from a static charge - Is there a simple physical argument to show why?
negative_passages.docid: 139043
negative_passages.text: What is the direction of magnetic lines of force inside a bar magnet?
negative_passages.docid: 48969
negative_passages.text: The magnetic field of a magnetic monopole
negative_passages.docid: 106807
negative_passages.text: Relation between magnetic moment and angular momentum -- classic theory
negative_passages.docid: 21326
negative_passages.text: Magnetic field insulators
negative_passages.docid: 29077
negative_passages.text: current in wire + special relativity = magnetism
negative_passages.docid: 30286
negative_passages.text: Perfect conductor and magnetic field
negative_passages.docid: 90157
negative_passages.text: Can a magnetic field be induced without an electric field?
negative_passages.docid: 52502
negative_passages.text: Conservation of Energy in a magnet
negative_passages.docid: 51414
negative_passages.text: Why does it seem like a broken magnet's poles flip?
negative_passages.docid: 78910
negative_passages.text: What causes matter to initially rotate/spin/orbit?