The magnets that stick to the front of a refrigerator are permanent magnets, not electromagnets. There is also a permanent magnet embedded in the door seal of most domestic fridges to keep the door shut.
add All magnetic fields are caused by the movement of electrons. In a permanent magnet, several of the electrons have their spin axes aligned, thus creating the magnetic field. [From the math, conceptually there could be a magnet monopole, but no one has found one yet.]
In an electromagnet, the current of the electrons along the wires creates the external magnetic field.
The way a permanent magnet (eg frig magnet) works is that the magnet induces a magnetic field of opposite sign in the sheet steel of the frig body, and the permanent magnet and the induced field attract each other.
Have a crack at ferromagnetic, and paramagnetic in your favourite on line encyclopedia.
all elictrecal stuff has to be conected to the earth through the earth line if not it will cause irretic feeling when touch due to accumelated static charge
Simple most refridgerators are made up of iron or contain iron in their frame and, iron being magnetic, causes magnets to stick
The magnet keeps the door closed.
yes
Yes, it is.
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.
No- but if it has an electric motor (most do) the motor operates by use of an electromagnet. Many refrigerator door seals (not all) includes magnets.
By definition an electromagnet is only working when it has a supply of electricity, a Permanent Magnet is always a magnet
no
An electromagnet is temporary because the field disappears when the current is 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.
IT is different because an electromagnet runs with electricity. A refrigiator does not run with electricity.
No- but if it has an electric motor (most do) the motor operates by use of an electromagnet. Many refrigerator door seals (not all) includes magnets.
a electromagnet is bigger than a bar magnet
electromagnet
a temporary magnet can be created by an electromagnet but it can also be created by any type of strong magnet
By definition an electromagnet is only working when it has a supply of electricity, a Permanent Magnet is always a magnet
Perminant magnet
the world is
An electromagnet.
no
An electromagnet is a stronger magnet.