Lecture 4 Lecture Notes

Lecture 4 Lecture Notes - b) Kirchhoff's law (for...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
2. Electric Circuits 2.1 Ohm's law 2.2. Quasistatic approximation collisions between charged particles and other matter => friction => equilibrium conductivity Typically: frequent collisions => low velocity Ohm's law have current follow E-field via Ohm's law neglect consistency quasi-static currents Interpretation: - Internal B-field (generated by circuit) follows current density J instantaneous - Instantaneous coupling E <=> J (Ohm) and B <=>J (Quasistatic approximation to Maxwell Equation) Lec 04 - 12. Jan Monday, January 12, 2009 8:35 AM Lecture Notes Page 1
Background image of page 1

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

View Full DocumentRight Arrow Icon
2.3 Properties of electric circuits a) charges (for stationary or quasi-static currents) no charges in a homogeneous conductor with stationary currents
Background image of page 2
Background image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: b) Kirchhoff's law (for stationary or quasi-static currents) current passing through surface c) Joule's heating law power-density velocity force density charge density for moving particles (dissipated energy per time &amp; volume) d) Restistance cross section area Kirchhoff's law: (independent of x) Ohm for any path C R: resistance along path C Lecture Notes Page 2 confined to source! inner resistance voltage of source electrostatic Field force per unit charge e) Electromotive Force Along full circuit: Any vector field F can be decomposed into transversal and longitudinal part: Here: Source outer circuit Note: 'Source' is in a way defined as the region where f= 0 Lecture Notes Page 3...
View Full Document

Page1 / 3

Lecture 4 Lecture Notes - b) Kirchhoff's law (for...

This preview shows document pages 1 - 3. Sign up to view the full document.

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