# tsl134 - The current density ~ J in a resistor depends on...

This preview shows page 1. Sign up to view the full content.

Resistance and Resistivity Resistor : device (material object with two terminals) Resistance : attribute of device Resistivity : attribute of conducting material A voltage V provided by some source is applied to the terminals of a resistor and a current I is observed flowing through the resistor. Resistance: R = V I [1 Ω =1V/A] (1 Ohm)
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: The current density ~ J in a resistor depends on the local electric field ~ E and on the resistivity ρ of the resistor material. • Resistivity: ρ = E J » 1V / m 1A / m 2 = 1Ωm – • Conductivity: σ = 1 ρ [1(Ωm)-1 ] • Vector relations: ~ E = ρ ~ J, ~ J = σ ~ E tsl134 – p.1/1...
View Full Document

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern