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Because they are always positive or negative, and they are equal and opposite.

In fact there is no such thing as magnetic poles, theoretically they don't exist but the idea of magnetic poles is introduced as a way of explaining magnetism to children.

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The terms, 'positive' and 'negative' are applied to electric charges, NOT magnetic poles. It is also quite incorrect to say that magnetic poles 'do not exist', as they most-certainly do. They can be identified by bringing a compass needle (itself, a small magnet) near to the end of a permanent magnet; the north pole of the compass needle will then indicate the south pole of the magnet.

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Q: Why do magnetic poles have to be opposite from each other?
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Related questions

What rule describes the behavior of magnetic poles?

Like poles repel each other, while opposite poles attract each other.


What is the law of attraction of magnetic poles?

In magnetism, opposite poles will always attract each other.


When placed near each other opposite magnetic poles repel each other.?

Yes, Because they repel each other.


How opposite charges or magnetic poles respond?

Magnets have a south pole and a north pole. Like poles of two magnets repel and opposite poles attract each other.


If the poles of two magnets repel each other?

They have the strongest magnetic forces :) precious


What happens when you move two opposite magnetic poles closer together?

they move away from each other!


State the rule that describes the behavior of magnetic poles?

Same poles attract where as opposite poles repel. N-N= repel N-S=attract S-N=attract S-S=repel


Do North poles attract North poles?

We know that like magnetic poles repel and opposite magnetic poles attract. North will repel north and south will repel south. On the other hand, north and south attract each other.


Why do opposite magnetic poles attract?

A magnetic field is created when the atoms of a magnet line to the north or south pole of the magnet. When two opposite poles face each other, the fields, and the atoms inside the magnet, line up, and this causes the attraction between the poles.


Magnetic poles that are alike?

No, there are two magnetic poles denoted by North (N) and South (S). N does not attract N, S does not attract S. N & S attract each other. Like pole repel.


What do poles of magnets do to each other?

opposite poles-attracts each other and like poles- repel each other


Do magnetic poles attract each other or repel each other or are they neutral to each other?

Magnetic poles act like charges, they attract(opposites) and repel (same).