CK-12-Physics - Intermediate

http://www.ck12.org Chapter 16. Electric Potential

8. Capacitance of an air-gap capacitor is given byC=ε 0 Ad whereAis the area of the capacitor anddis the
   separation distance between the plates.


9. The charge on a capacitor is directly proportional to the voltage of the capacitorQ=CV.


10. A dielectric material placed between the plates increases the capacitance of the capacitor. The capacitance of
    a capacitor with a dielectric is expressed asC=kε 0 Ad, wherekis the dielectric constant.


11. The energy stored in a capacitor can be expressed as

U=

1

2

QV

U=

1

2

QV^2

U=

1

2

Q^2

C

WhereQis the charge on the capacitor andVis the voltage of the capacitor.