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Electrical counterpart of bar magnets are called as ____________

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Electrical counterpart of bar magnets are called as ____________

(a) Ceramics

(b) Electrical Magnets

(c) Electrets

(d) Electrostriction

This question was addressed to me in an internship interview.

Query is from Types of Dielectric Materials in chapter Dielectrics of Engineering Physics II

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Correct choice is (c) Electrets

For explanation I would say: Electrets are the electrical counterparts of bar magnets. It produces an electric field in the space around it. They are a bar of dipolar solids.

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