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Notes:
Piezoelectric effect is a phenomenon where specific types of material produce an electric charge proportional to the mechanical stress applied to them.
The piezoelectric effect was discovered in 1880, in quartz.
Quartz, topaz, etc. are few examples of piezoelectric crystals.
Such crystals are used in cigarette lighters, electric guitars, TV remote controls, audio transducer.
Quartz is the most famous piezoelectric crystal which is used in this capacity in analog wristwatches and clocks.