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Forums
Physics
Classical Physics
Electromagnetism
If a magnet could switch, could it attract and repel?
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[QUOTE="sophiecentaur, post: 6141813, member: 199289"] Way back, the only magnets that you could get hold of, to play with, were 'horseshoe magnets'. (I don't mean the plastic jobs with a small magnet on each arm) but the 'real ones' [URL='https://www.ebay.co.uk/itm/MINI-HORSESHOE-MAGNET-TRADITIONAL-TOY-BOYS-GIRLS-GIFT-BIRTHDAY-PARTY-BAG-FILLER/281556133971?epid=1360287200&hash=item418e0da853:rk:4:pf:0&checksum=281556133971070c6e4071bd436bb6b2153dfc9f1099&enc=AQADAAADAFjVrDbVsZ8oH%2F8PNHtt9VX4%2Fw7FZcmMuqsX8uaFEduV3G3oIh%2BECKXmqRarVcCy2etpREwgYCGVSr7E2gsLg9LGCmbUs8tOXgCtyRCY1m%2Fo79BYGw1Snk7YwDhCrW3WGor7K6mvlt0tK4SVberjHImVIPXnJf9gruqqX3ei9Voj573wfXblL3DFORb5BrRZGmfOy%2FtYI0c%2Bkp07zbNXufeObqXLQOxP6ZNZD7eX9EAN0cS%2Bsm%2F8RUHQOvlt4y381ZvLBzFAmxUZsJ2VH7xAHjsn2B4c6XMAlWPZYE2WJ9yrIVBKDg7N3ykT85a%2F2vhKIwJsrWdAmtvDDjotUjRw5qsXd1q0cFdi51MdiqKqjNW52obdmuJcbF3DSaNvVV7G0FX0witbbnLH2SmHLLoaKgZzyZVEVNCG9pMKCmcniznfWoqxf%2FL6d7ickIlC%2FkOcNBboiKoq4ksj7NwIGYltRjMNodeUy916S3QRq8Y49F7j5BufuxM%2BDiMdyCBv0dovBzNIP%2FDg%2B%2FQJ8MnFwbjwubDdE03mAPfqZkuM3Kb2bVBf8BtADl1kr%2BY9797fY%2BFP3oALsIYy0yPGKvnOt4RervP%2BGKkt83065KKrE1OSbbqSYlrnztCcTiY%2FqkP1sAa0Xcskh%2BCrR5piXoMF5Zj29KXipKyyNZcyLoMAs2w6hlhwkmZTJFKdyFyMsZnXAo9ar0NO6d%2BKCBhLal5mGeWXtGA4UcDlgq9XlfSlpoNE%2B%2FSuLl3a7qpVYtmN3NTR0ONJ5ZZt0SxjGwnnVHL5yErwQLsUOIt4iP3zFwXcWCsrpVso8z4KHqzllnaet1yuTSu1Vb3deqxDL3cGkdC4fqSB%2FoE01YvLeg%2Bey0ZiXZFVCJI0n%2BK3HslzfPXYsoZEgw07Yd3HUko9IHv%2BCDfskdAvZoA%2B4rD4Or2hXrN8MOPnqg2pICcrM8dCcxOYuFkQtKaAbzvgTYyMPg%2FPYn%2Fz9zeRwE%2BCL8E%2BqyEbOIk29CPuW6fIi4T28CYa2u%2Bptr2QKsg5fA%3D%3D']like this one[/URL]. The local field between the poles was very much higher than could be obtained at the end of a simple bar magnet (made with steel in the old days). Two horseshoe magnets could be adjusted so that a rotation of π would switch between attraction and repulsion. It strikes me that the whole essence of poly magnets is based on the same thing and that there would be a lot of intuition gained by playing with a few horseshoe magnets without needing to spend too much on high performance mini magnets which would require very accurate and rigid positioning for an experiment to work. [/QUOTE]
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Electromagnetism
If a magnet could switch, could it attract and repel?
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