Where is the electromagnet the strongest?

Answer 1

The strongest type of electromagnets are superconducting electromagnets. Usually these superconducting electromagnets are immersed in liquid nitrogen or liquid helium to cool them to near absolute zero. === === For non-superconducting electromagnets, the strongest electromagnets would have the greatest ampere turns over a large area. The core of the magnet would be a highly ferromagnetic material, such as iron, or a mixture of a ferrite and a ceramic. Very strong electromagnets used for lifting machinery have both poles on the bottom side which will maximize the magnetic field produced. Non-superconducting electromagnets will saturate and stop producing magnetic fields at about 2 teslas or so. This is the limit of magnetic strength of ordinary electromagnets.

Answer 2

The strength of an electromagnet depends on:

• the amount of current in its windings
• the number of turns of wire making its windings
• the type of core material used (ferromagnetic materials like iron are best)

Answer 3

The field of an electromagnet will be strongest along its core, and at the immediate ends of the core.

Answer 4

-- a coil with the most turns of wire

-- the largest electric current through the coil

-- a core made of the most permeable iron