This is a simple way to reverse the current in the coil of the electromagnet.
What would be the result if a hard steel core were placed in the electromagnet?
The electromagnet is defined as a mass of iron around which is placed a helix for conducting an electric current.
E is the electromagnet of the relay, and R A is its armature.
The field may revolve or the electromagnet may revolve, whichever is the most convenient to construct.
This would be the same whether the magnet were a permanent or an electromagnet.
It will be plain to all that we might make the electromagnet stationary and revolve the permanent magnet and get the same result.
The heater is cut out by an electromagnet when the glower goes into operation.
It relates to the electromagnet of a Morse receiver of the pattern habitually used on the French telegraph lines.
We can also wrap wires around this circular iron and make an electromagnet of it.
A device consisting of a coil of insulated wire wrapped around an iron core that becomes magnetized when an electric current flows through the wire. Electromagnets are used to convert electrical control signals into mechanical movements. See Note at magnetism.