uss about dielectric materials and dielectric constant.
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- *Boundary conditions for perfect dielectric materials*What is a dielectric material? Give two examples.How active components are different from passive electronic components explain with examples. How are electrolytic capacitors constructed? Explain how they are categories as polarized and non-polarized electrolytic capacitors.
- We want to investigate how the field strength will be with air as dielectric and with steatite. A plate capacitor is placed in a 24 kV network between phase and ground. The relative permittivity of air is &=1 and for steatite &-6. The plate capacitor has area = 1m². The distance between the electrodes is 2 mm. Ep = 8.854-10-12 F/m A=1m² d=2mm a) Calculate the maximum field strength in the plate capacitor. (Answer: 9.8kV/mm) b) What is the capacitance of the capacitor if we use steatite? (Answer: C = 26.6nF)Each of three insulators forming a string has self-capacitance of "C" farad. The shunt capacitance of each cap of insulator is 0-25 C to earth and 0-15 C to line. Calculate the voltage distribution across each insulator as a pecentage of line voltage to earth and the string efficiency.Briefly explain the differences between conductors, insulators, and semiconductors in terms of energy bands, give examples, and then draw the energy band diagrams.
- What is exchange interaction energy? Explain the origin of ferromagnetism with necessary figures.This question is about electrical conductivity: 1. How are electrical properties different for isotropic 3D bulk and 2D sheets?Question A suspension type insulator has three units with self-capacitance C and ground capacitance 0.1C. What will be the string efficiency?