Lecture 25b

# Lecture 25b - Capacitors(contd Discussion of Exam 1 Capacitors in parallel Have the same potential difference V across their plates Net charge q =

This preview shows pages 1–9. Sign up to view the full content.

Capacitors (contd.) Discussion of Exam 1

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

View Full Document
Capacitors in parallel Have the same potential difference V across their plates Net charge q = q1 + q2 + q3 Equivalent capacitance Think about them like one giant capacitor with the area of 1 2 and 3 together. (Work out on board)
Capacitors in series Have the same charge q on their plates Net voltage V = V 1 + V 2 + V 3 Equivalent capacitance eq 1 2 3 1 1 1 1 C C C C + Examples (Work out on board)

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

View Full Document
Capacitor with dielectric Dipoles align so as to reduce the E field between the plates E 0
5 One parameter – k (Kappa) the dielectric constant – can describe the modifications. Easy rule … Everywhere there is an e 0 , change it to e ke 0 . d A d A C 0 0 ke e Dielectric material increases the capacitance! air CC k Material Dielectric constant Breakdown E Field (MV/m) = dielectric strength Air ° = 1.00054 3 Paper ° = 3.5 16 Tantalum Oxide ° = 26 500 Water ° = 80 depends on purity

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

View Full Document

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 02/05/2011 for the course PHYS 220B taught by Professor Preminger during the Fall '10 term at CSU Northridge.

### Page1 / 9

Lecture 25b - Capacitors(contd Discussion of Exam 1 Capacitors in parallel Have the same potential difference V across their plates Net charge q =

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online