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Piezoelectricity is due to net dipole moment

Some electric current is produced on heating polar crystals, this is pyroelectricity

Ferroelectricity is due to alignment of dipoles in same direction

Ferroelectricity is due to alignment of dipoles in opposite direction

answer is A.

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Piezoelectric is due to polar crystals pyroelectricity Alignment of dipoles in same direction Ferroelectricity

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