Recent content by elegysix
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Undergrad Determining the number of arrangements (complicated)
Empty buckets are ok. This is similar to the algorithm I've got. I like the idea, I will think more on this. The closest thing I've found to this subject is multisets, but the function ##\left(\!\!{a\choose b}\!\!\right)## isn't quite right. I have included an image which is similar to the...- elegysix
- Post #6
- Forum: Set Theory, Logic, Probability, Statistics
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Undergrad Determining the number of arrangements (complicated)
Suppose we have K buckets of differing sizes, so that each bucket can only hold a specific number of rocks, S{k}. Suppose then we are given a specific number of rocks N, which are indistinguishable from one another, and the order of filling doesn't matter. We want to know how many arrangements...- elegysix
- Thread
- Replies: 7
- Forum: Set Theory, Logic, Probability, Statistics
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Phase difference in long runs of wire
Tell me more. this is fascinating. I don't know what difference the MEN link or ground plane would make. Nor had I considered radiation. I was simply wondering if the phase difference might act like a short, or whether something more complex would happen. Please, elaborate. What would be the...- elegysix
- Post #11
- Forum: Electrical Engineering
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Phase difference in long runs of wire
to be clear I've made a better picture. What I'd like to know is what kind of power would be going through such a circuit, and what would be happening when S3 is closed (when S1 and S2 closed). What would happen with a 90 degree phase difference across S3? or 180?- elegysix
- Post #9
- Forum: Electrical Engineering
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Phase difference in long runs of wire
Yes, it is shorted on itself. And there is a phase difference between where it is shorted, before shorting it. so what happens? that is the question.- elegysix
- Post #5
- Forum: Electrical Engineering
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Phase difference in long runs of wire
Welllll, not exactly. See, in your scenario there is a single loop going back to the source. Mine is a little different. In my wiring example, the hots connected together would be connected to a resistor and the neutral. But forget about that. Here's a simplified picture. When you have a large...- elegysix
- Post #3
- Forum: Electrical Engineering
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Does AC form a closed loop circuit?
yes the rotation is due to repulsion or pulling between the magnets. As for why the winding increase the magnetic field, i would say look up biot savart law. Basically the more electrons you have flowing in a loop, the stronger the magnetic field inside it becomes. So more windings is more...- elegysix
- Post #36
- Forum: Electrical Engineering
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Does AC form a closed loop circuit?
AC motors have a few varieties, but essentially it boils down to the induced magnetic field interacting with a permanent magnetic field. They can repel or pull, I don't think there is a reason to prefer one over the other.- elegysix
- Post #34
- Forum: Electrical Engineering
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Does AC form a closed loop circuit?
In this case it is a DC motor. In a generator, the motor would turn the coil and create DC where the power supply is.- elegysix
- Post #32
- Forum: Electrical Engineering
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Does AC form a closed loop circuit?
I couldn't find an animation but this picture shows the split disk and direction of rotation, with the connections... maybe it will help? you can imagine the disk and wire rotating, you see the brushes touch different sides as it rotates- elegysix
- Post #30
- Forum: Electrical Engineering
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Does AC form a closed loop circuit?
there are brushes on the coil which drag along the disk. They rotate with the coil, and are set up so that when the voltage is switching the brushes are going to the other side of the disk (left to right or right to left). Like running your two fingers around the rim of a glass (on opposite...- elegysix
- Post #28
- Forum: Electrical Engineering
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Does AC form a closed loop circuit?
so the black wire and neutral wire would be hooked up to the commutator as left side and right side. (it's a disk with two isolated sides). As the coil rotates in the generator it makes positive voltage for one half the cycle and negative voltage for the other half (in the coil). when the coil...- elegysix
- Post #26
- Forum: Electrical Engineering
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Does AC form a closed loop circuit?
So the commutator works by reversing the AC current when it goes negative/backward. Thus the circuit always is positive/forward (DC). no you don't need a battery.- elegysix
- Post #24
- Forum: Electrical Engineering
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Does AC form a closed loop circuit?
commutators are used to reverse current in the generator to keep generating DC (iirc), induced emf is what is going on with the rotating loop in the magnetic field. The changing magnetic flux causes positive and negative voltage which gives rise to AC.- elegysix
- Post #22
- Forum: Electrical Engineering
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Does AC form a closed loop circuit?
Yes, the same electrons get pushed and pulled back and forth. There are no other electrons available because it is a closed and isolated loop.- elegysix
- Post #20
- Forum: Electrical Engineering