Am kg ball containing a positive charge q hangs deflected on the side of positively charged plate. The electric field due to the charged plate at the position of the ball is E, indicated by horizontal arrows. If the angle between field and the string is q, which one of the following equations describe the relation between the field and the tension T on the string? E A. E sin0 =T B. T sine = E C. T sine = qE D. T cos0 qE E. Tcos0 = E + + + + + +

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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.