Question

What is di-electric strength? Whats the di-electric strentgh of mica?

Answer 1

Di-electric strength:- In an insulator or dielectric, the valence electrons are tightly bound so that no free electrons are available to conduct current. But when a potential or voltage is applied to the material, there comes a point where these electrons may break away and the material could loose its insulating properties.

Dielectric Constant of Mica.—The constant was determined for 18 samples of mica, varying in thickness from 0.005 to 0.073 inch and including 12 different grades. Each sheet was placed between two mercury electrodes and the capacity of the condenser thus formed was determined with a shielded capacity and conductance bridge using alternating current at 1,000 cycles per second. It was found that while thick sheets with plainly visible air films had low dielectric constants, those without such films gave fairly consistent results, running from 6.4 to 9.3 with an average of 8.1. When a thick sheet was split, the thinner sheets had higher constants except in the case of a sample of Canadian amber.
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Answer 2

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