07_insulcond - Lesson 7: Insulators, Conductors, and the...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Lesson 7: Insulators, Conductors, and the Others There are four categories of materials based on their conductivity (ability to allow charges to move freely). Conductivity is just a way of describing how easily charges can move through a material. Imagine you have two metal spheres, one charged and the other neutral. If you place an iron nail between the two so it touches both spheres, the uncharged sphere is now charged (the other one is also still charged, just not as much as it was originally). If you had used a piece of rubber instead, the uncharged sphere would not have gained any noticeable charge. We say that the iron is a conductor , while the rubber is an insulator . As a rule… most metals are pretty good conductors , since they allow charges to move around quite easily. most other materials are insulators , since they resist the movement of electrical charges. Keep in mind that even insulators will conduct a little charge. Semiconductors There are a few materials (silicon, germanium, carbon) that are semiconductors . Even though you would not normally think that these non-metals can conduct electricity, they
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/02/2011 for the course PHYSICS 235 taught by Professor Staff during the Fall '08 term at Rutgers.

Page1 / 2

07_insulcond - Lesson 7: Insulators, Conductors, and the...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online