In a concentric spherical electrode system, the outer radius is 7 cm and the voltage is 100 kV and is constant. Find the maximum electric field for the value 3.5 of the geometric characteristic. Does puncture occur? What type is it. (Ed=65 kV/cm)

In a concentric spherical electrode system, the outer radius is 7 cm and the voltage is 100 kV and is constant. Find the maximum electric field for the value 3.5 of the geometric characteristic. Does puncture occur? What type is it. (Ed=65 kV/cm)

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter25: Surge, Spike, And Lightning Protection

Section: Chapter Questions

Problem 10RQ: In reference to the load, how are capacitors connected to help prevent voltage spikes and surges?...

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Concept explainers

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.

Question

3- In a concentric spherical electrode system, the outer radius is 7 cm and the voltage is 100 kV
and is constant. Find the maximum electric field for the value 3.5 of the geometric
characteristic. Does puncture occur? What type is it. (Ed=65 kV/cm)
a)
EMAX=60 kV/cm full puncture
EMAX= 76kV/cm partial puncture
EMAX= 70 kV/cm partial puncture
d)
EMAX= 70 kV/cm full puncture
EMAX= 80 kV/cm full puncture

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