The 50 lossless coaxial cable is filled with a dielectric material between the inner conductor and the outer conductor. The material has a dielectric constant of & 4. Another lossless coaxial cable has the same size as this cable but is filled with a new material having a dielectric constant of &r= 2. Is the characteristic impedance of the other cable smaller or greater than 50 2? Justify your answer.

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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.