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How many poles does a electromagnet have?

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2009-11-05 01:07:38
2009-11-05 01:07:38

An electromagnet has two poles; north and south.

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The way the motor works is that the electromagnet is placed in between two opposite poles of a magnet so that the north pole of the electromagnet will point to the north pole of the magnet. The south pole of the electromagnet will point to the south pole of the magnet. Naturally, the two poles will repel each other, causing the electromagnet to rotate 180º until the poles of the electromagnet attract the poles of the magnet. The electromagnet will stop in that position since the poles of the electromagnet and the magnet will attract. But motors continue to move though, so how does that happen if the motor stops after rotating 180º? This is done by doing an electromagnetic flip, in other words, you switch the poles so that they would repel and continue moving. The way the flip works is that the charges on the ends of the electromagnet switch, switching the poles also. This continually happens after every 180º turn to keep the electromagnet spinning. Attached to the electromagnet can be a fan or any device.


The poles of the electromagnet are repelled and attracted to the poles of the field magnet in the motor, causing it to spin a commutator or rotor in the motor. A brush flips the poles to keep the electromagnet spinning and the rotor moving.


The poles of the electromagnet changes or magneticfield changes it direction.


the shape of the core and the distance between the poles affect the strength of the electromagnet



Switch the polarity of it. If it's DC, then swap your + and - wires.


You can switch poles in electromagnetic field by switching the polarity of the DC voltage supply feeding the electromagnet.


Interchange the positive and negative direct current connections.


An electromagnet is a magnet that runs on electricity. Unlike a permanent magnet, the strength of an electromagnet can easily be changed by changing the amount of electric current that flows through it. The poles of an electromagnet can even be reversed by reversing the flow of electricity.


The earth is an electromagnet. It has a north pole and a south pole. Apex: A magnet always has two poles, earth is a elecrtomagnet


The comon bar magnet has two poles, and the electromagnet can be turned on and off also the electromagnet uses electricity to create a magnetic field in the first place. so the difference is normal magnet cant be turned on and off but the electromagnet can. does that answer ur question?


Energize your electromagnet. Then take a magnetic compass and move it close to it. The NORTH seeking tip of the compass will be attracted to the South pole of the electromagnet, and vice versa.


Electrical energy is used to create a electromagnet with alternating poles. These alternating poles will cause another magnet with constant poles attached to an armature to turn and create mechanical energy.


No. magnets always have two poles, (even electromagnets). Designated North and South.



An electromagnet is a magnet that runs on electricity. Unlike a permanent magnet, the strength of an electromagnet can easily be changed by changing the amount of electric current that flows through it. The poles of an electromagnet can even be reversed by reversing the flow of electricity. An electromagnet works because an electric current produces a magnetic field. The magnetic field produced by an electric current forms circles around the electric current.


Yes electromagnet would be attracted to a magnet provided direct current flows through the coil ie when the electromagnet is activated. As unlike poles attract each other the magnet is to placed accordingly. Otherwise repulsion would take place.


In an electromagnet, the negative side of the coil is said to "emit" the magnetic field lines- it is the north pole of the electromagnet. However, in alternating current, the energized wire alternates between positive and negative. As a result, a conventional electromagnet running on alternating current would constantly be undergoing a reversal of the poles.


The poles of an electromagnet can change depend inf on the current supplied.


many people uses an electromagnet when working.


SOME Electromagnet like permanent magnets have two poles(north/south). Likewise the rules for SOME Electromagnets are the same as those of a permanent magnet(same poles repel, different poles attract).


Absolutely, as does the direction of the current. A fairly good example is in the link below.


Magnetic poles are points on a magnet that have opposite qualities.Atoms in a magnet have unpaired electrons.Getting a electromagnet charged enough is important to how strong the magnet is.North poles are attracted to south poles and repelled by other north poles.Electromagnets are made by a electric current.Temporary magnets are magnets made by materials that are easy to magnetize.South poles are attracted to north poles and are repelled by other south poles.


It has 2 poles. They are the North and South Poles.


Nothing - The polarity of an electromagnet depends on the direction of current flow and you can effect the same change in orientation to the earth's field by moving the electromagnet rather than the earth's field.



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