Is there any simple, low-energy way to make a permanent magnet able to turn 'on and off' (similar to an electromagnet)? - Quora
![magnetics - Magnet that needs power to turn off? Inverse coil? - Electrical Engineering Stack Exchange magnetics - Magnet that needs power to turn off? Inverse coil? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/AKwdA.jpg)
magnetics - Magnet that needs power to turn off? Inverse coil? - Electrical Engineering Stack Exchange
![Magnetpro Multipurpose Switch Magnet, Magnet System with Max. 660 lbs Extraction Force, On/Off Magnet for Lifting, Working & Welding Positioning, Liquid Filtration, Automation, Metal Separation: Amazon.com: Industrial & Scientific Magnetpro Multipurpose Switch Magnet, Magnet System with Max. 660 lbs Extraction Force, On/Off Magnet for Lifting, Working & Welding Positioning, Liquid Filtration, Automation, Metal Separation: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/517cUOozUFL.jpg)
Magnetpro Multipurpose Switch Magnet, Magnet System with Max. 660 lbs Extraction Force, On/Off Magnet for Lifting, Working & Welding Positioning, Liquid Filtration, Automation, Metal Separation: Amazon.com: Industrial & Scientific
![Dry Erase Magnetic Roll, Glossy White Write On/Wipe Off Magnet, 24 inches by Flexible Magnets(2 FT X 25 FT) - Walmart.com Dry Erase Magnetic Roll, Glossy White Write On/Wipe Off Magnet, 24 inches by Flexible Magnets(2 FT X 25 FT) - Walmart.com](https://i5.walmartimages.com/asr/57f75a2d-75f8-4f5b-ac86-52fa5c2c9cc8_1.2dbbc21de86f1f9cc79b787e7f5c3b16.jpeg)
Dry Erase Magnetic Roll, Glossy White Write On/Wipe Off Magnet, 24 inches by Flexible Magnets(2 FT X 25 FT) - Walmart.com
![Strong Hand Tools - Str-7089 , Heavy Duty, Adjust-O Magnet Square, On/Off Switches, Pull Force: 160 lbs, 6" x 5-1/8" x 1-3/8", MSA48-HD: Magnetic Sweepers: Amazon.com: Tools & Home Improvement Strong Hand Tools - Str-7089 , Heavy Duty, Adjust-O Magnet Square, On/Off Switches, Pull Force: 160 lbs, 6" x 5-1/8" x 1-3/8", MSA48-HD: Magnetic Sweepers: Amazon.com: Tools & Home Improvement](https://m.media-amazon.com/images/I/81MJK4g3ReL.jpg)
Strong Hand Tools - Str-7089 , Heavy Duty, Adjust-O Magnet Square, On/Off Switches, Pull Force: 160 lbs, 6" x 5-1/8" x 1-3/8", MSA48-HD: Magnetic Sweepers: Amazon.com: Tools & Home Improvement
![H-type SM. When off the magnetic flux closes between the two magnets.... | Download Scientific Diagram H-type SM. When off the magnetic flux closes between the two magnets.... | Download Scientific Diagram](https://www.researchgate.net/publication/282572429/figure/fig1/AS:363393354616833@1463651135597/H-type-SM-When-off-the-magnetic-flux-closes-between-the-two-magnets-Rotating-the-upper.png)