Question
Download Solution PDFA permanent magnetic material has _________ retentivity.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFPermanent magnets, such as those made from materials like neodymium or samarium cobalt, have high retentivity.
This property allows them to retain a strong magnetic field even in the absence of an external magnetic field. High retentivity is a desirable characteristic for materials used in permanent magnets because it ensures that the magnet will maintain its magnetic properties over time.
Difference between temporary and permanent magnet:
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Permanent magnets |
Temporary magnets |
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Permanent magnets are those magnets that retain their magnetism for a long period of time. |
Temporary magnets are those magnets that lose their magnetism as soon as the cause producing their magnetism is removed. |
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Materials like iron, nickel, and cobalt are used for making permanent magnets. |
Soft Iron materials get magnetized very easily, hence iron is used for making temporary magnets. |
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Bar magnet and horse-shoe magnet are common examples of permanent magnets. |
Electromagnets are the common examples of temporary magnets. |
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Permanent magnets are used in magnetic compasses, magnetic door catches, motors, generators, loudspeakers, etc. |
Temporary magnets are used in cranes to lift massive loads, electric bells, transformers, circuit breakers |
Last updated on Jun 16, 2025
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