chris kennedy
Senior Member
- Location
- Miami Fla.
- Occupation
- 60 yr old tool twisting electrician
If you have 20 mins to kill I highly recommend this......................................
I watched this and wasn't overly impressed. They just hit it repeatedly until all the links failed. It was interesting to learn how really high amperage fuses were constructed.If you have 20 mins to kill I highly recommend this......................................
How much does one of those cost?
did not look, but shouldn't currents in same direction have same magnetic polarity and repel one another?At first I was wondering why the two parallel cables jumped apart at 13:41 because they should attract each other if their currents are in the same direction. But after playing it at a lower speed, it looks like they came together and closed the small gap between them first and then they rebounded apart.
That appears to be used.
The magnetic fields produced by the two conductors will encircle each conductor in the same direction because the currents are going the same way. However, the direction of the magnetic field on one side of its circular path around a conductor is opposite to its direction on the other side of that path. Here I am referring to the direction of the magnetic field in a tangential direction along its circular path. Therefore the polarity of the magentic field at conductor #1 created by conductor #2 will have an opposite polarity as the magentic field at conductor #2 created by conductor #1. Therefore, along the lines of your argument, opposites attract and the forces will pull the wires together.did not look, but shouldn't currents in same direction have same magnetic polarity and repel one another?
currents in opposite direction would have opposing magnetic polarity and be attracted to one another.
Yeah, I don’t think he would destroy a brand new one, but what do I know..That appears to be used.
Looks like the sell for around $2900
When you have a bolted short circuit between two phase conductors of AC the currents will be in opposite directions and will repel. This is the situation most often encountered.did not look, but shouldn't currents in same direction have same magnetic polarity and repel one another?
currents in opposite direction would have opposing magnetic polarity and be attracted to one another.
Magnetic fields around a conductor carrying current must not be quite same as they would be for simple bar magnets laying next to one another?When you have a bolted short circuit between two phase conductors of AC the currents will be in opposite directions and will repel. This is the situation most often encountered.
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In both cases the attraction or repulsion is due to magnetic fields. But the orientation and path of the magnetic fields relative to the object that is creating the magnetic field is different. In the bar magnet the path of the magnetic field is lengthwise along the magnet then out one end and back around through the air to the other end. In a wire the magnetic field encircles the conductor, and so its direction is not along the length of the wire.Magnetic fields around a conductor carrying current must not be quite same as they would be for simple bar magnets laying next to one another?
They are somewhat similar if you orient the bar magnets correctly. For a CCC, the magnet field lines are circular around the conductor, while for a bar magnet, they are loops that go through the bar. So the arrangement that makes the fields most similar has the bar magnet perpendicular to the wire, tangent to one of wire's field lines.Magnetic fields around a conductor carrying current must not be quite same as they would be for simple bar magnets laying next to one another?