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

To magnetise the soft iron pieces

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To increase the strength of the magnets

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To avoid self demagnetisation

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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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Similar questions

Why solenoid are used to magnetise a piece of magnetic materials, like soft iron, when placed inside the coil?

Consider the following statements :

(i) Soft iron conducts electricity

(ii) Soft iron is magnetic material

(iii) Soft iron is used for magnetic permanent magnets

(iv) Soft iron is used as electro magnet

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