How can i get info on magnets, like how to measure there pull, how much energy does it make over a foot of spun copper compared to the pull.
You can leave an optional "tip" with Mahalo's virtual currency, Mahalo Dollars. If you are asking a difficult question that might require some research, or if you'd like a wide variety of feedback, a higher tip often leads to more answers to your question.
M$3 Answers
As for the pull of a magnet, that is very dependent on how the flux lines are concentrated. I know of a magnet that is ~1"thick by 2"dia. If you stick this magnet to a filing cabinet, it is difficult but very possible to get it off by hand. However if you were to stick it to say, a safe, or one of the huge steel plates they like to use in road construction, you would never get it off. The filing cabinet is made of thin material that lets the flux leak out the back, the plate steel is thick enough that it is capable of redirecting all the flux lines.
My interpretation of "how much energy does it make over a foot of spun copper" is "how much energy would a foot of wire spun over a magnet produce"
That is a bit loaded/complicated. I will put a comment to this in a bit with more details.
You can leave an optional "tip" with Mahalo's virtual currency, Mahalo Dollars. If you are asking a difficult question that might require some research, or if you'd like a wide variety of feedback, a higher tip often leads to more answers to your question.
M$I used this site before I found an ebook with the same info.
You can leave an optional "tip" with Mahalo's virtual currency, Mahalo Dollars. If you are asking a difficult question that might require some research, or if you'd like a wide variety of feedback, a higher tip often leads to more answers to your question.
M$
You can leave an optional "tip" with Mahalo's virtual currency, Mahalo Dollars. If you are asking a difficult question that might require some research, or if you'd like a wide variety of feedback, a higher tip often leads to more answers to your question.
M$
Thank you that's more information then what i though id get and all of it is very useful to my biuld
One more thing. It's not so simple to say that you have a 20000gauss magnet. you have to also specify what area it is affecting.
There is a site that is selling a magnet that has a field strength at its tip of 2+ teslas. You may think "Awesome, that's a powerful magnet." but it most likely won't even hold your chair to the wall. compare that to an MRI machine which also has a ~2tesla field. Yet the MRI will pull a rolling chair across the room. What's the difference? The size of the field. One has a 2 tesla field that is 1 square mm, the other has a 2 tesla field that is half a square meter.
Hope you're brushed up on your physics.
E is the electromotive force (emf) in volts
N is the number of turns of wire
ΦB is the magnetic flux in webers through a single loop.
1 weber is a magnetic field of 1 Tesla (10000Gauss) in an area of 1m^2 (1T*m^2)
So, to determine the voltage produced by a coil, you need to know the area of your coil, the number of turns in it, and how fast you are turning it.
The voltage created will be approximately: the number of turns in the coil * area in square meters of the coil * magnetic field in Teslas * the rotational speed (radians/sec)
I hope this helps.