why would an electromagnet with a steel core not be good for lifting cars? also i need help with this magnet rule: 'A magnet field is strongest where the lines of force are __________.'
The steel would become a permanent magnet under the influence of the electromagnet and would then not fully release all of the metal it was lifting. .lines of force are 'closest'.
As AC fields pass through a core, eddy currents are created in the material, which creates heat. Transformer cores are made up of many plates with thin insulation between them to help reduce the eddy currents.
