Permanent Magnets
Permanent magnets are those we are most familiar with, such as the magnets hanging onto our refrigerator doors. They are permanent in the sense that once they are magnetized, they retain a level of magnetism. As we will see, different types of permanent magnets have different characteristics or properties concerning how easily they can be demagnetized, how strong they can be, how their strength varies with temperature, and so on.
Temporary Magnets
Temporary magnets are those which act like a permanent magnet when they are within a strong magnetic field, but lose their magnetism when the magnetic field disappears. Examples would be paperclips and nails and other soft iron items.
Electromagnets
An electromagnet is a tightly wound helical coil of wire, usually with an iron core, which acts like a permanent magnet when current is flowing in the wire. The strength and polarity of the magnetic field created by the electromagnet are adjustable by changing the magnitude of the current flowing through the wire and by changing the direction of the current flow.
1. natural magnets
2. artificially induced permanent magnets
3. electromagnets
They are permanent, temporary and electromagnets
Stainless steel woodplastivs
Cobalt, Nickel, and lead
copper, nikel and iron
because door magnets are stronger than metal thumbtacks
Three things that attract to magnets are things that are made of iron,metal,and heavy things
There are three classification of color. The three classification of color are primary colors, secondary colors and artery colors.
There are three classification of color. The three classification of color are primary colors, secondary colors and artery colors.
The only three things that magnets can attract to are iron, nickel, and cobalt.
They are permanent, temporary and electromagnets
Glaze Hail and Drizzle are the three main classification for climate ppt
There are three elements in a magnet: iron, boron, and neodymium.
Stainless steel woodplastivs
Cobalt, Nickel, and lead
water, magnets, and pets
copper, nikel and iron
the three examples of classification of technology ! are biotechnology , gmo (genetically modified organisms ) and bioremediation ...