Electromagnet: driven by current

Sub: Science and tech

Electromagnets:

Invented by William Sturgeon in 1824, electromagnets are crucial in various modern applications like loudspeakers, motors, MRI machines, maglev trains, and particle accelerators.
They work by creating a magnetic field when an electric current flows through a coiled wire.
This magnetic field is intensified if the wire is wrapped around a magnetic core, typically made of ferromagnetic metals like iron.
Iron cores enhance the magnetic field because their internal atomic magnetic fields align with the external field produced by the current, amplifying the overall magnetic effect.
The magnetic field exists as long as current flows through the coil, and some materials may retain weak magnetism even after the current stops.
Superconducting electromagnets, used in MRI machines, utilize superconducting wire coiled around a core to generate extremely strong magnetic fields up to 30 tesla.
Bitter electromagnets, another type, can produce fields up to 40 tesla by flowing current through wires coiled around a stack of electromagnets.

Uses of Electromagnets:

Disadvantages of Electromagnetism:

They heat up very fast
It consumes a lot of energy
They can store huge amounts of energy in their magnetic field. If the electric current is interrupted, the energy will discharge

Source: TH