Engineering
Physics
Communication Channel Mode of Communication Basic Terms and Block Diagram
Classification of Magnetic Materials
I vs H Curve for Different Materials
Question
The materials suitable for making electromagnets should have:
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Solution
The materials suitable for making electromagnets should have-high retentivity and low coercivity. Coercivity is usually measured in oersted or ampere/meter units and is denoted HC. When the coercive field of a ferromagnet is large, the material is said to be a hard or permanent magnet.