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# AP Physics Chapter 17 Electric Potential and Electric Energy; Capacitance - PowerPoint PPT Presentation

AP Physics Chapter 17 Electric Potential and Electric Energy; Capacitance. 17-1 Electric Potential and Potential Difference Potential or electrical potential is the potential per unit charge. V a =Pe a /q

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## PowerPoint Slideshow about 'AP Physics Chapter 17 Electric Potential and Electric Energy; Capacitance' - abla

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### AP Physics Chapter 17Electric Potential and Electric Energy; Capacitance

17-1 Electric Potential and Potential Difference

Potential or electrical potential is the potential per unit charge. Va=Pea/q

Potential difference is the difference is the work done by the electric force in moving a charge from point a to b. Vab=Va-Vb=-Wba/q

The SI unit for DV is the volt… J/C

DV=PEb-Pea=qVba

• See chart and diagram p 504

• See Example 17-1 p505

• W=qVba

• W=Fd=qEd where d is the distance ll to field lines from point a to b…

• qV=qEd …so V=Ed and E=V/d

• See Example 17-2 p 506

• Equipotential lines, or in 3-D, equipotential surfaces are areas of equal potential and are perpendicular to the electric field at any point. (See pg. 507 diagram.)

• There can be no electric field in a conductor in the static state.

• 1eV= 1.6 x10-19J

• You must use the J value to calculate with KE=1/2 mv2

• V=k Q/r = 1/(4pe0) (Q/r) for a single pt. charge.

• See Example 17-3 p509

• See Diagrams pg 509See Example 17-4 and 17-5 p510/511

• P522 1-8&10,13-14 due Tuesday BOP