how does a electromagnet work?

Answer 1

DC Current flows through a long wire around ferrous core ,this establishes a magnetic field but is only half the function. If u substitute AC current it will magnetize and the field will fluctuate. Now if u rap some more wire around the AC exp. u will find that there will be current transformed across to the secondary winding with an turns ratio between the 2 coils with no physical connection.

Answer 2

Electricity and magnetism are related through Maxwell's Equations.

Basically, passing a wire through a magnetic field induces a current (in one direction) through the wire.

Alternatively, passing current around a magnetic material will induce a magnetic field, creating a "magnet" with some polarity.

Electromagnets are simply ferrous materials (materials that contain some form of iron, making them able to hold/direct a magnetic field) inside a coil of wire. Current is passed through the wire, magnetizing the material.

More amperes (or turns) creates a stronger magnet.

This is the basis for how all electric machines work.

Answer 3

the electricity causes a magnetic field

simple form is loads of copper wire wrapped around a ferous metal core and connected to a battery

Answer 4

i thats right he knows