what makes magnets so powerful?

Question

for example what makes magnets so powerful ?

Answer 1

For the physical reasoning behind why magnets work the way they do, check out this Wikipedia article (particularly the section called Physical Origin of Magnetism).

A few things I would add to or say differently than the Wikipedia article:
** In powerful permanent magnets, we use materials that have a large amount of "coercivity". Basically, we can think of it as the amount of magnetic field intensity that the material retains. Certain materials are better than others concerning coercivity (see the second Wiki article for a few examples).

** For electromagnets, the amount of force exerted depends on the amount of turns in a coil, the current through the coils, and the materials/physical arrangement of the magnet. So, if you wrap a lot of insulated wire around a piece of iron (good magnet material) and send a lot of current through that piece of wire, you can potentially have a very strong magnet. In fact, electric motors and generators usually use magnets like these to produce lots of force (motor) or lots of electricity (generator).

There is a lot of other theory to learn (involving things like permeability, reluctance and other nonsense), but that is the jist of it, hehe.

Answer 2

Magnets use 'electromagnetic' forces to do their work.

Electro-magnetic forces are one of four basic kinds of force known in physics, and they are the third most powerful.

The weakest is gravity. We feel it as strong, but it takes a HUGE earth to exert the gravity we feel. And even then we can quite easily jump.

Electromagnetic forces (which is what a magnet uses) are a lot stronger, in fact 1 with 36 zeros after it times stronger. It is the force that holds molecules together (holds one atom to another). When we see it in a magnet, it doesn't appear very strong, but it is quite easy to get a tiny magnet and lift something against gravity.

The strongest is called the 'strong' force, 100 times stronger than electromagnetic forces, but it only works over tiny distances. It is the force that holds the nucleus of an atom together, but the distances are so small we don't exeprience it directly on the scale that we can see.

Answer 3

You would have to be much more specific, but the most powerful magnets (man made) are electromagnets. The parameters of reality not withstanding, there is essentially no limit to the power one could generate with an electromagnet: more power and more, smaller coils = more power.

Answer 4

The rearragment of molecules in the same direction Noth and South

Answer 5

look it up on the internet