Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [magnet]

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Derivation of magnetising force on the axis of a short solenoid

Reference I will refer to is Textbook of Electrical Technology by Theraja, page 268 (iv) Magnetising Force on the Axis of a Short Solenoid The derivation is already there. I just don't understand the visuals that well because they look so…
AndroidV11
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Baking an MC on a hotplate with magnetic stir

I recently got a batch of MCs (ESP32s) datasheet that were not in a desiccated and sealed bag. Because they are humidity sensitive devices and I am reflow soldering I needed to bake them to ensure that the module wasn't damaged during soldering. I…
Feynman137
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BlueRay disc reader failed to disengage, how to fix

I got a BlueRay disk player which is failing to a very stupid mechanical defect. The spin head below this cover is magnetized and when the drive is closed it will raise and slot in the disc in the hole in the middle of the disc, then the small piece…
Jimmy Chi Kin Chau
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Closed horseshoe magnet

If you would take a c shaped iron bar that you would join together (with threaded ends with another threaded bar for example) and then wind in wire, would it act like like a toroidal magnet or still like a horseshoe magnet since there's still…
user210482
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Electromagnet stays energized after being switched off

I've designed a circuit to turn on/off a 12V electromagnet but when I turn off power to the magnet it still has a magnetic force. The magnetic force when OFF is not as strong as when it is ON but it still has more magnetic force than desired. The…
Jeff Wahaus
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Copper coated neodymium magnets for battery connection?

I'm looking at making a quick disconnect battery that is attached with magnets. It looks like most magnets have a coating for abrasion and oxidation protection but no mention of conductivity. Is it possible to coat the magnet in a dielectric then a…
usernamechecksout
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