Electromagnets and permanent magnets both attract or repel other magnets and attract iron and other substances. An electromagnet is a magnet that is only active when it has a current passing through it; permanent magnets are always active.
By definition an electromagnet is only working when it has a supply of electricity, a Permanent Magnet is always a magnet
The difference between an electromagnet and a bar magnet is that the bar (steel) magnet is always turned on, therefore always magnetic. The electromagnet is a magnet that is powerd by a battery so you can turn it on and off.
PermanentThere is no source of current in a compass, therefore the magnet is a permanent magnet.
Each produces magnetic field They have a north and south magnet
A permanent magnet (in contrast to an electromagnet).
Electromagnet will the current is running.
An electromagnet is a stronger magnet.
A permanent magnet is always magnetised (example is a simple bar magnet). An electromagnet is only magnetised while an electrical current is flowing through the coil. Once the electricity is switched off, the electromagnet ceases to be magnetised.
Electromagnets can be turned off by stopping the flow of electricity.
A permanent magnet (i.e. not an electromagnet) will be demagnetised by heating it.
When you need a magnet you can turn on and off an electromagnet is used.
Not necessarily. The key difference between a permanent magnet and an electromagnet is the a permanent magnet does not change whereas an electromagnet's magnetic feild can be altered by varying the current through it. This means that electromagnets are more useful because they can be turned on or off, turned up or down or be put in 'reverse'.
A natural magnet is permanent - an electromagnet loses its power when it's switched off.
A refrigerator magnet is magnetic because it is a "permanent" magnet. An electromagnet is a magnetic field caused by a current flowing through a wire.
An electromagnet is NOT permanent; the magnetism can be turned on and off. Also, an electromagnet constantly requires a current, and therefore energy, to remain on.
It is a permanent magnet. Electromagnets(as the name suggests) requires an electric source to become a magnet, when the power source is turned off it will not function as a magnet.
The advantages are that:* The electromagnet can be turned on an off. * The electromagnet can be made much stronger than a permanent magnet.
Well, when an electromagnet is turned on, it produces a magnetic field just like a permanent magnet's magnetic field.
An electromagnet is a magnet while an electric current is running through the coil. Turn off the current and it is no longer magnetised, and is, therefore, not a permanent magnet.
no, a bar magnet is a permanent magnet while an electromagnet is a coil of copper wrapped around a metal which temporarily magnetizes rather than permanently.
A motor transforms electricity. Inside the motor, there is a permanent magnet and an electromagnet, which can rotate. When the circuit is closed, the electromagnet is constantly repelled and attracted to the permanent magnet. This will cause the electromagnet to turn. It also causes anything that is attached to the electromagnet to turn, causing motion.
They both have a magnetic field, even though an electromagnet has no magnet.
The only similarities are that they both have magnetic fields and they both have a ferrous core. A permanent magnet is magnetic at all times. An electromagnet is only magnetic when there is a current passing through the coil around a ferrous core. Whereas a permanent magnet has a fixed field strength, the field strength of an electromagnet is dependent on the amount of electric current applied to it.