They are generally made of a ferrous material and require no external stimulation to produce the magnetic field they have a north and south pole.
A refrigerator is not a magnet, however it does contain an electric motor, and within that motor are permanent magnets (as well as electromagnets).
Electromagnets are more useful than permanent magnets because their magnetic field strength can be easily controlled by adjusting the amount of electric current flowing through them. This allows for greater flexibility in various applications, such as in electric motors, speakers, and magnetic levitation systems. Additionally, electromagnets can be turned on and off as needed, while permanent magnets have a fixed magnetic field.
ya definitely
It will after aboout 6 washes.
Iron, Cobalt and Nickel.
in the year 1949
That's Why It's Called PERMANET?
I think t it permanet
Electromagnets are used in MRIs because they can produce a strong and adjustable magnetic field, which is necessary for generating detailed images of the body's tissues. The strength of the magnetic field can be controlled by adjusting the electric current flowing through the electromagnet coils, allowing for precise imaging. Additionally, electromagnets can be easily turned on and off, making them more practical for medical applications compared to permanent magnets.
Refrigerator magnets, car magnets, neodymium magnets are names of small magnets.
work area
establishing permanet settlements