AndreyG
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That's what I thought. I thought if one current is twice as large as another on the side of weaker current I will have magnetic field cancellation at same distance as distance between the wires. Trying to model it in software and I do not see it.
For a straight wire of infinite length carrying a const current, the radial magnetic field is inversely proportional to the distance.
For two parallel wires carrying the same current in the opposite direction, the magnetic field cancels in the middle. The cancellation point (line in this case) will always be in between the two wires.
For two parallel wires carrying the same current in the same direction there will be no cancellation of the magnetic field.
For an alternating current fed to a straight wire, the wire acts like an antenna (EM radiation takes place). The magnetic field at a radial distance is still proportional inversely to the distance and the instantaneous current.
For two parallel wires, the cancel zone will still be in between the two wires but the position depends on the magnitude and the relative phases of the current.
For two parallel wires carrying the same current in the opposite direction, the magnetic field cancels in the middle. The cancellation point (line in this case) will always be in between the two wires...
For two parallel wires carrying the same current in the same direction there will be no cancellation of the magnetic field...
I question this statement sorry. I believe for two currents traveling i the same directions there will be cancellation point/line between the wires. For two currents traveling in opposite directions and unequal currents cancellation point/line will be outside the wires on the side of smaller current.
can you show this? - I am still struggling with this.
The total cancellation zone will be narrow indeed and if one current is twice the other it will be on the side of smaller current at the distance equal to distance between the wires. That's simplistically without taking into account mutual coupling, just assuming field drops as 1/r.
I thought if one current is twice as large as another on the side of weaker current I will have magnetic field cancellation at same distance as distance between the wires
I model wires as two loops with currents in opposite directions
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