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Unread 17-11-2002, 10:38
DanL DanL is offline
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Quote:
Originally posted by wysiswyg

It gets quite confusing especially if you haven't taken physics yet. There are formulas that also help explain this and are useful unfournatly I don't have the book that I got the from on me.
Aye, I'm taking ap physics right now - we just didn't get into the electricity unit yet.

Quote:
Originally posted by wysiswyg
Ahh It goes back into the wires. Where else would it go?? Get a voltmeter and attach it to a motor. Turn the motor's shaft by hand. You should get a voltage reading.
Yeah, I understand that it goes back into the wites, but when it was said the current is (12V supply - back EMF)/ 0.1 Ohms, how does the back EMF cancel out the 12V power supply? Is the back EMF traveling the opposite way of the incoming voltage? If so, I thought that electricity flows towards ground, and so wouldn't the back EMF be not traveling towards ground? Basically I don't understand how the back EMF flows.
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