electromagnets are used for transporting heavy iron machinery in industries.why are the permanent magnets not used for this purpose.

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Solution

Because strength of the permanent magnets is constant and we can vary the strength of the electromagnet according to the need.That is why they are used.

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Similar questions

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

Which of the following is not used for making permanent magnets?

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