Q- A volume of 3.0 x 106 m³ of ground water was pumped out from an unconfined aquifer uniformly from an area of 5 km². The pumping lowered the water table from initial level of 102 m to 99 m. Find the specific yield of the aquifer.

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Q: 2. Determine the voltage e, across the 20-12 resistor. 15 V 4011 www 150 www 2002

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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.