chapter24 - .A aera gnivah dna)etinifni sa setalp gnitaert...

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

View Full Document Right Arrow Icon
Capacitor Any two pieces of metal (conductor) brought near each other. Parallel plate capacitor L W Area A = L x W Charged capacitor “Charged Capacitor” has no net charge. +++++++++++++++++++++++ ----------------------------------------- +Q -Q E=0 E=0 E Electric Field (treating plates as infinite) and having area A. = = = A Q E E 0 0 1 | | ε σ v d
Image of page 1

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

View Full Document Right Arrow Icon
Capacitance +++++++++++++++++++++++++++ ---------------------------------------------- +Q -Q = = A Q E 0 0 1 ε σ Ed r d E V V = = = v v ) ( 0 d A Q V = We define “capacitance” V Q C For parallel plate capacitor d A C 0 d Capacitance V Q C Can think of capacitor as a device for storing charge (and also energy). Units [Capacitance] = [Coulomb/Volt] = [Farad]
Image of page 2
L L d A parallel-plate capacitor has square plates of edge length L, separated by a distance d. If we doubled the dimension L and halve the dimension d, by what factor have we changed the capacitance? A) 1.0 B) 2.0 C) 4.0 D) 8.0 E) 16.0 () 2 22 o oo o 2L AL L C8 dd d / 2 d ε εε ε == = CPS Question How big is a one Farad Capacitor? CPS question Assume you have two parallel plates that are separated by 1 mm. If you estimate ε 0 ~ 10 -11 , what is the area of the plates to have a 1.0 Farad capacitance?
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 ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern