lecture10 - September 20, 2011 Physics for Scientists &...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: September 20, 2011 Physics for Scientists & Engineers 2, Chapter 24 1 September 20, 2011 Physics for Scientists & Engineers 2, Chapter 24 2 Capacitors are devices that store energy in an electric eld Capacitors are used in many every-day applications • Heart de brillators • Camera ash units • Touch screens Capacitors are an essential part of electronics Capacitors can be micro-sized on computer chips or super-sized for high power circuits such as FM radio transmitters and exist in a variety of shapes September 20, 2011 Physics for Scientists & Engineers 2, Chapter 24 3 A capacitor consists of two separated conductors, usually called plates, even if these conductors are not simple planes If we take apart a typical capacitor, we might nd two sheets of metal foil separated by an insulating layer of Mylar e sandwiched layers can be rolled up with another insulating layer into a compact form that does not look like parallel sheets of metal Assume a convenient geometry and then generalize the results e geometry we choose is a parallel plate capacitor , which consists of two parallel conducting plates, each with area A , separated by a distance d , in a vacuum e capacitor is charged by placing a charge of + q on one plate and – q on the other plate e electric potential, Δ V , between the plates is proportional to the amount of charge on the plates September 20, 2011 Physics for Scientists & Engineers 2, Chapter 24 4 We can take a slice through the x- y plane e equipotential lines are close together between the plates and far apart outside the plates September 20, 2011 Physics for Scientists & Engineers 2, Chapter 24 5 e potential difference between the two plates is proportional to the amount of charge on the plates e proportionality constant is the the capacitance of the...
View Full Document

This note was uploaded on 02/03/2012 for the course MTH 235 taught by Professor Staff during the Fall '11 term at Michigan State University.

Page1 / 17

lecture10 - September 20, 2011 Physics for Scientists &...

This preview shows document pages 1 - 7. Sign up to view the full document.

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