Insulators Definition and 64 Threads

what is the difference between insulators and dielectrics?::confused:

Hi all A conductor is a conductor, because it has an unfilled energy band. Likewise, insulators have filled bands, hence they do not conduct. Now, these two statements say nothing about the mobility of the electrons. How is it that an unfilled band is equivalent of mobile electrons, while a...

why are topological insulators called TOPOLOGICAL insulators? what factor of topology apperas in the phenomenon

i want to paint my electrical componets and my transformer with a spray paint with a color of metallic black, does metallic paint contain metals? won't this short short circuit anything?

Hello all, I'm just getting to grips with conduction in solids and am trying to find some values for the band gap between the valence and the conduction bands. All I can find anywhere are typical values for semiconductors (or about an eV). I also found that carbon in the diamond configuration...

This seems like almost too much of an elementary question, but what properties of metals / insulators cause their bandgaps to differ?

Casimir says that there is a force between two neutral metal plates when they are close..suppose if we replace the metal plates with insulators,will there be the same casimir force? what is the difference? why casimir used metal plates,he could have used insulator also?i think insulator is also...

Hi, I'm looking for an inexpensive liquid, that should be used as an insulator. My first pondering was if there is a way of converting water to insulators. Thanks in advanced.

Homework Statement A balloon, initially neutral, is rubbed with fur until it acquires a net charge of -0.60nC. (a) Assuming that only electrons are transferred, were electrons removed from the balloon or added to it? (b) how many electrons were transferred? Net Charge = Q = -0.60 nCHomework...

Is air a conductor or insulator? Does it matter about humidity? Also, is all forms of carbon insulators or conductors?

Hi all. I was thinking of something: Bound charges in an insulator arise because of the polarisation, so even though we have bound surface and volume charges, an insulator will still be electrically neutral. I was trying to apply this line of though to a magnetized object. Here, the...

Every conductor or insulator becomes/is believed to become perfectly conducting at o kelvin Similarly every resistor should also have some upper limit i.e. it should become insulator at some very high temperature? Is it so? Please explain...

As I understand it, conductors interact with EM waves (light) in such a way that prevents transmission through the conductive material. Given this, why aren't all insulators transparent? Why is SiO2 transparent, but Si by itself is not? Any and all information helpful. TIA, yert

I am going to attach the question along with this post so that you guys can see the questions and the diagram and be able to help me in answering my question better. I found the ccharge on the inner sphere and it is -3.928e-9 and the charge on the outer sphere is 8.15698e-9. Now I have to...