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Question

Why permanent magnets are kept with soft iron pieces at ends as keepers ?

A
To magnetise the soft iron pieces
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B
To increase the strength of the magnets
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C
To avoid self demagnetisation
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D
For physical safety of the magnets
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Solution

The correct option is C To avoid self demagnetisation
The Permanent magnets are kept with soft iron pieces at ends as keepers to avoid self demagnetisation.

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