If magnetic material can retain it's magnetic properties indefinitely then why couldn't this be harnessed to produce energy?
2006-09-05 10:03:01 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Physics
It is, its called a generator... a magnet is rotated along a could of wire and induces an electrical current.
the process is called, strangely enough, Magnetic Induction.
Electro Magnetic Induction would use a magnet that is created by the movement of electricity through a coil and then moving that along another coil, this is done in a device called an Alternator.
2006-09-05 10:08:05 · answer #1 · answered by Archer Christifori 6 · 2⤊ 0⤋
A permanent magnet can produce a force on certain types of metal, which means such an object exists in a potential energy well relative to the magnet. The object can be designed to move towards the magnet, taking on kinetic energy by converting over potential energy as it falls deeper into the well.
However, because of friction, it takes even more energy to move back out of the well than you freed up by falling into it. Therefore, it is a one way trip, so a permanent magnet is no more an energy source than gravity.
2006-09-05 19:42:15 · answer #2 · answered by SAN 5 · 1⤊ 0⤋
Inductive Reactance is the generation of electricity from a magnetic field, whereby passing an magnetic field within a coil of wire induces electrons in the wire to move in the direction of the magnetic field, the voltage and amperage are calculated from the strength of the magnetic field opposed to the resistance of the wire.
2006-09-05 17:20:30 · answer #3 · answered by Anonymous · 1⤊ 0⤋