query: How long does it take a magnet to lose its magnetization?
positive_passages.docid: 75296
positive_passages.text: How long does a permanent magnet remain a magnet?
negative_passages.docid: 3223
negative_passages.text: Blandford-Znajek process: Why/how does the current flow along the magnetic field lines
negative_passages.docid: 48013
negative_passages.text: What is the mechanism by which magnetic fields do work?
negative_passages.docid: 109916
negative_passages.text: Magnetic field at the centre of a loop
negative_passages.docid: 146106
negative_passages.text: Permanent magnets near wifi device
negative_passages.docid: 3386
negative_passages.text: How can magnets be used to pick up pieces of metal when the force from a magnetic field does no work?
negative_passages.docid: 155089
negative_passages.text: Geomagnetic reversal?
negative_passages.docid: 101261
negative_passages.text: Magnetic Potential Energy
negative_passages.docid: 102752
negative_passages.text: Is Earth really a magnet?
negative_passages.docid: 29390
negative_passages.text: Should a "loading" text or spinner stay a minimum time on screen?
negative_passages.docid: 107934
negative_passages.text: Is there any potential associated with magnetism
negative_passages.docid: 31264
negative_passages.text: What happens to the magnetic field in this case?
negative_passages.docid: 114958
negative_passages.text: How long do dropped items persist?
negative_passages.docid: 72533
negative_passages.text: Does the shrink effect caused by the Wand of Wonder last the full minute?
negative_passages.docid: 51414
negative_passages.text: Why does it seem like a broken magnet's poles flip?
negative_passages.docid: 48969
negative_passages.text: The magnetic field of a magnetic monopole
negative_passages.docid: 119658
negative_passages.text: How long would it take to doff armour heated by the Heat Metal spell?