9. Calculate the capacitance between two parallel plates each of which is 100 cm? and 2 mm apart in air. a. 0.443 uuF b. 0.515 μμF c. 0.452 µµF d. 0.502 μμF 10. Calculate the magnitude of the electric field at a point that is 30 cm from a point charge Q = -3.2 x 10-6 c. 3.2 x 10-6 N/C b. 3.0 x 105 N/C c. 2.8 x 10°N/C d. 2.4 x 105 N/C а.

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Dielectric Breakdown

A dielectric is a material with low electrical conductivity and so is classified as an insulator. Dielectric materials are used to block the flow of electricity through them, allowing them to behave as an insulators. They can also be used to store electric charge or improve capacitance.Dielectrics have no free electrons for conduction because electrons are tightly bound to the nucleus. Because dielectrics contain a small number of electrons for electrical conductivity, they have a dipole. The two primary roles of dielectrics in electrical devices are insulation and electrical energy storage. An electric field polarizes the dielectric, and the polarization of the molecules allows dielectric materials to store charge.