A coil of 500 tums and resistance 202 is wound uniformly on an iron ring of mean circumference 50cm and cross sectional area 4cm². It is connected to a 24V dc supply. Under these conditions the relative permeability of iron is 800. The permeability of free space uo = 4,1 x 10-H/m. Calculate %3D (i) The magnetomotive force (ii) The magnetizing force (iii)The magnetic flux developed in the circuit.

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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.