{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Phys 0175 - Lecture 17

Phys 0175 - Lecture 17 - Lecture 17(Feb 20 2009 Chapter 27...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture 17 (Feb. 20 2009): Chapter 27: Circuits Essential elements of an electrical circuit Definition of emf; internal resistance Single loop circuits; resistors in series Multiloop circuits; resistors in parallel Analyzing multiloop circuits using Conservation of Energy and Conservation of Charge Illustrative examples
Background image of page 1

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

View Full Document Right Arrow Icon
Electromotive Force: A steady electric current requires a complete circuit. Otherwise the moving charges will quickly set up an electric field that opposes the electric field that existed initially and the current would stop. In order to produce a steady flow of charge a circuit needs to have a “charge pump” that maintains a potential difference between a pair of terminals, i.e. a battery or a power supply. Such a device is called a source of electromotive force (emf)
Background image of page 2
Schematic diagram of an ideal source of emf connected to a complete single loop circuit E = iR Always remember that charge is conserved in a circuit The connecting wire segments are assumed to have zero resistance
Background image of page 3

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

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}