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An electromagnet is only magnetic while electricity is being passed through it. When the electricity is turned off, it no longer works.
Sherwood Ritchie
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What types of magnet either permanent or electromagnetic for AC or DC relay?
What types of magnet either permanent or electromagnetic for AC and DC relay?"how DPDT relay works?
What happens when a strong electric field is passed through a permanent magnet?
The electrons of the permanent magnet would align the way the electromagnetic field passed through the magnet.
How are the uses of an electromagnet different from those of a permanent bar magnet?
A bar magnet is made from magnet materials and has a magnetic field at all times. An electromagnetic is not naturally magnet and only has a magnetic field when electricity is passed through it.
Is the magnet in a compass a permanent magnet or electronic?
A. Compasses typically use a permanent magnet.
Is magnetite a magnet?
No, it's a permanent magnet. It consists of an iron oxide, and iron is a permanent magnet.
Is a needle in a compass a permanent magnet?
Yes, it is a permanent magnet.
Explain the difference between permanent and electromagnetic magnets?
In an electric magnet there is an ordinary metal used which when you run a current through it, induces a magnetic field, the permanent magnet (usually made of lodestone) contains particles which are already arranged in a manner that produces a magnetic field.
Is magnetite a temporary magnet?
No, it's a permanent magnet. It consists of an iron oxide, and iron is a permanent magnet.
What is PMDC motors?
PMDC-Permanent Magnet DC motor is a DC machine where the Permanent Magnets form the stator of the machine instead of conventional Field winding. It works on the same principle of electromagnetic induction.
What distinguishes a permanent magnet from a temporary magnet?
Permanent magnets do not lose their magnetic ability. Temporary magnets, however, gain magnetic properties when they are touched or moved by a permanent magnet. The properties of a temporary magnet dissipates over time after the permanent magnet is removed.
Is the magnet in a compass a permanent magnetic or an electromagnet?
PermanentThere is no source of current in a compass, therefore the magnet is a permanent magnet.
Is a Refrigerator magnet a Permanent magnet?
yes
