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Ch 24 Capacitance and Dielectrics © 2005 Pearson Education

24.1 Capacitors and Capacitance © 2005 Pearson Education

Definition of capacitance Circuit diagrams: © 2005 Pearson Education

capacitance of a parallel-plate capacitor in vacuum © 2005 Pearson Education

Example 24.1 A parallel-plate capacitor has a capacitance of 1F. If the plates are 1mm apart, what is the area of the plate? A parallel-plate capacitor has a capacitance of 1F. If the plates are 1mm apart, what is the area of the plate? ANS: ANS: © 2005 Pearson Education

24.2 Capacitors in Series and Parallel capacitors in series © 2005 Pearson Education

capacitors in parallel © 2005 Pearson Education

24.3 Energy Storage in Capacitors and Electric-Field Energy potential energy stored in a capacitor electric energy density in a vacuum © 2005 Pearson Education

Example 24.8 Suppose you want to store 1J electric potential energy in a volume of 1m 3 vacuum. What is the magnitude of the required electric field? If the field magnitude is ten times larger, how much energy is stored per cubic meter? Suppose you want to store 1J electric potential energy in a volume of 1m 3 vacuum. What is the magnitude of the required electric field? If the field magnitude is ten times larger, how much energy is stored per cubic meter? ANS: ANS: © 2005 Pearson Education

24.4 Dielectrics © 2005 Pearson Education Dielectric constant © 2005 Pearson Education

definition of permittivity parallel-plate capacitor, dielectric between plates electric energy density in a dielectric © 2005 Pearson Education

24.5 Molecular Model of Induced Charge © 2005 Pearson Education

24.6 Gauss’s Law in Dielectrics © 2005 Pearson Education

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