How do electromagnets work if two are close to one another?

If I wanted to set up two electromagnets very close to one another, would the polarities switch and then attract the electromagnets themselves? I don't want this to happen.

Answer:
It depends on what you sort of electricity you provide to the EMs. If you provide Direct Current, then there will be no problem. Look at auto-body sites where they use DC electromagnets to pick up cars.

Two EMs near eath other (fed with direct current) will either always attract or repell - there will be no "switching" unless you feed them with alternating current.

Ron.
No, the offset each other
No, their polarities are set by the direction of current flow through their coils.
Assuming you are powering them with direct current, the polarity is determined by the direction of the current flow. Depending on that, they would either attract of repel one another.

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