# lecture11 - Capacitance (Chapter 26) How much charge can a...

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

Capacitance (Chapter 26) Capacitance (Chapter 26) How much charge can a conductor hold? •Definition •Calculating Capacitance •Dielectric Constant Serway and Jewett sections 26.1, 26.2, 26.5 Practice: Chapter 26, problems 1, 3, 7, 45 Definition : Capacitance C between two conductors, V Q C V = potential difference created when charge +Q is on one conductor, and –Q is on the other. Unit : (F) farad volt coulomb 1 =

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

View Full Document
Example 1: Parallel Plates Example 1: Parallel Plates area A, separation d d +Q -Q Surface charge densities: A Q ± ± σ Quiz: Quiz: d +Q -Q As the plates are moved apart, which of the following will increase? A) Electric field between the plates B) Electric potential difference between the plates C) Capacitance between the plates
Example 2: Concentric Spheres Example 2: Concentric Spheres R 1 R 2 1 2 1 1 1 4 = R R C ο πε Derive: (do for homework!) Examples: Examples: 1) 2 sheets of foil, 25 cm x 40 cm, 1 mm apart (in air.) 2) The earth (as an isolated sphere.)

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 12/03/2009 for the course CHEMISTRY 1E03 taught by Professor Britz during the Spring '09 term at McMaster University.

### Page1 / 6

lecture11 - Capacitance (Chapter 26) How much charge can a...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online