I have gotten a neodymium magnet from a kid in my high school and when I passed through the detector (I think it is a medal detector.) it started to vibrate in my hand. I was wondering what causes this. I think it is from magnets or whatever is in the devises that were on either side of me but I’m not sure.

I was looking online at security detachers because I’m opening a small boutique and I realized that the handheld ones are just powerful magnets. Can’t I just buy a neodymium magnet and save some money?

Im making a laser and im trying bind the power source to 2 wires that run to the diode butt i don’t have any small neodymium magnets so i was going to use something a bit bigger. Im not sure what their called but they are the ones that you throw in the air and they collide making a ”bbbbbbbbbbbzzzzzzzzzzzz” sound but i cant get the wire to stay in between the magnet and the button cells. so i was going to glue them but wasnt sure if that screw with the magnetic polarity. will this work ?

Ok, this is related to my previous question. I want to make a magnetic liquid from one of my old neodymium magnets, but I have no idea what to use. I know I need a liquid carrier and a surfactant (compound which prevents the magnetic particulate from clumping).

However in this case I am using a magnet composed of NIB: Neodymium-Iron-Boron compound, and I have no idea what chemicals to use. Another problem I have is that my magnet is in solid form – I need a way to reduce it to a powder, without blowing myself up (NIB powder is highly explosive apparently).

Any ideas?
I have seen the guides available from websearching. I don’t need a guide on how to manufacture one using certain ingredients – I need advice on chemicals to use for my specific circumstance.

i need them for a science project but i dont want to order them or anything. i already check radio shack for the magnet wire. Any other ideas?
i live in thousand oaks, california. is their any stores located by me that might sell the magnet wire.

i found the earth magnets at radio shack.
and the wire i need is “24 gauge enamel coated magnet wire”

I am helping my daughter to build a typical magnet+coil handcrank AC generator. It has two super-strong rare earth magnets and around 400 rounds of 32 AWG magnet wire. But she is disappointed to see that it can only generate .2 volts and 200 microAMP of AC current. Does anyone have experience on this ? Is this typical value? She was expecting much more than this ? Is she doing any mistake ? Can someone please provide me some insights ?
Thanks much.
Thank tbsl101 for your response, could you please clarify then how a “handcrank radio” work ? RPM is certainly less than 5000 RPM, what else if different. Also, what other configuration would you need to know ?
Thanks again.

Please just answer the question or explain how to do it. I don’t need people telling me it’s illegal or explaining to me why it’s illegal, and what will happen if I am caught. I know all those things, and I don’t care! I am doing a study for a nearby country that still deals with consistent electrical supply problems, and any meaningful answers will be used to help finish my study. This is just one of the many questions in this study, but one that I have been having trouble getting legitimate answers too online.

a neodymium magnet block (say, just we’re talking a few inches in dimensions) or an electromagnet of similar dimensions??