Pyro Electricity Assignment Help | Pyro Electricity Homework Help


When certain crystals, e.g., tourmaline, are heated uniformly, one end becomes positively charged and the opposite end negatively charged. When cooled, the charges are reversed. This phenomenon is called ‘pyro-electricity’. If a crystal be broken up, each part of it exhibits the same properties. If the tourmaline be powdered and spread on a glass plate and warmed or cooled, the particles gather themselves in chains owing to polar charges.

Boracite, quartz and fluorspar are among the pyro-electric minerals
Riecke has shown that the electrification increases with increase of temperature. The emf is given by
        E = at + bt2
Here, t is the change of temperature. a and b are constants.

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