Can current in a wire be stopped if wire is placed between two strong electromagnets?
whose field oppses the one in the wire
Interesting, i wish more elaborate answer.
Well, i know very well how generator/alternator works. I'm asking why alternating magnetic field would not induce current in opposite direction to DC current already flowing in the wire?
For example if we feed pulsed DC to electromagnets and this pulsing mag. field induces voltage on the wire opposing the voltage already present, we should get pulsed DC on the wire too.
oldschool know Maxwell's equations as well as Heavisides and rest of the crew, don't answer if you don't know the answer.
Pulsing DC is AC but that's not what you said, you said current on the wire has to be AC which is wrong.
"A DC field opposing a DC current, no. But if the wire is carrying an AC current an external AC magnetic field could create an opposing current in the wire."
Philomel I clearly wrote pulsed DC that induces voltage oppossing the DC, so it always subtracts.
- 6 months ago
According to tom beardean, a very strong magnet will warp the spacetime in its vicinity. Placing a piece of wire there will simply transform the mystic scalar hyper dimensional undetectable scalar component into a regular electromagnetic component detectable in the lab frame. So the wire will be modulated with top secret scalar broadcast and transmissions from a hyper dimension. A dc current passing through the wire will also get modulated by hyper dimensional info.
To answer your question. No the magnet will not halt the dc current but will modulate the current with info from a hyperdimensional scalar type field undetected by regular means.
- StevenLv 76 months ago
The current in a wire is the sum of applied voltage/impedance and that induced by crossing magnetic flux so that sum could be zero as long as conditions are maintained, but a DC current would require a crossing magnetic flux that expands infinity, ie impossible.
A pulsed DC current induces an AC response equal to the non-zero frequency components of the waveform. A DC field does not induce any current since the flux is stationary and does not cross the conductor.
You can not make an electric valve=transistor out of a wire. Transistors are made of semiconductor crystals that contain impurities that allow current flow similar to the way ions allow current flow in water. The structure of the semiconductor junction creates a depletion zone where conductivity can be controlled with an electric field.
- PhilomelLv 76 months ago
a static magnetic field from a magnet will not induce a current in a wire.
It would require a moving magnetic field or an increasing magnetic field which is increasing without bounds to infinity. This is impossible so, NO is the answer to the question.
- oldschoolLv 76 months ago
Learn Maxwell's equations.
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- 異域秦後人Lv 76 months ago
NO ! ELECTROMAGNETIC FIELD ONLY ABLE THE CHANGE ELECTRON FLOW DIRECTION.
- derframLv 76 months ago
A DC field opposing a DC current, no. But if the wire is carrying an AC current an external AC magnetic field could create an opposing current in the wire.
A changing magnetic field can induce an electric current in a nearby wire. This is the way a generator/alternator works. If the induced current was of the same magnitude but opposite phase of the current existing in the wire without the external magnetic flux, then the current would be cancelled. But only a *changing* magnetic field can induce that current in a wire.
Pulsing DC = AC.