When a solid dielectric material is subjected to uniform electric fields, the solid dielectric specimen is...
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When a solid dielectric material is subjected to uniform electric fields, the solid dielectric specimen is compressed by the electric field creating a potential for the physical damage to the solid dielectric material. (1) (11) (111) (iv) Describe how the solid dielectric material can be compressed by the uniform electric field. (3 marks) Express the maximum apparent electric field stress if the mechanical instability occurs at do/d-1.67 where do is the initial thickness of the solid dielectric and d is the thickness under the electric field stress. Er Determine the maximum electric field stress, in V/µm, of the three materials given in Table Q1.1, giving that so is 8.85× 10-12 F/m. Determine the most practical electric stress that can be applied across the three materials when they are used as insulators? Justify the answers. Table Q1.1 Parameters of three solid dielectric materials Solid dielectric BaTiO3 Al2O3 167.4*10⁹ P 345.0*10⁹ P Young's Modulus 18500 10 PET 3.1*10⁹ P 3 When a solid dielectric material is subjected to uniform electric fields, the solid dielectric specimen is compressed by the electric field creating a potential for the physical damage to the solid dielectric material. (1) (11) (111) (iv) Describe how the solid dielectric material can be compressed by the uniform electric field. (3 marks) Express the maximum apparent electric field stress if the mechanical instability occurs at do/d-1.67 where do is the initial thickness of the solid dielectric and d is the thickness under the electric field stress. Er Determine the maximum electric field stress, in V/µm, of the three materials given in Table Q1.1, giving that so is 8.85× 10-12 F/m. Determine the most practical electric stress that can be applied across the three materials when they are used as insulators? Justify the answers. Table Q1.1 Parameters of three solid dielectric materials Solid dielectric BaTiO3 Al2O3 167.4*10⁹ P 345.0*10⁹ P Young's Modulus 18500 10 PET 3.1*10⁹ P 3
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