Ap physics chapter 17 electric potential and electric energy capacitance
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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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Ap physics chapter 17 electric potential and electric energy capacitance

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


17 1 cont d
17-1 (Cont’d)

  • See chart and diagram p 504

  • See Example 17-1 p505


17 2 relation between electric potential and electric field
17-2 Relation Between Electric Potential and Electric Field

  • 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


17 3 equipotential lines
17-3 Equipotential Lines

  • 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.


17 4 the electron volt a unit of energy
17-4 The Electron-Volt …a unit of Energy

  • 1eV= 1.6 x10-19J

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


17 5 electric potential due to point charges
17-5 Electric Potential Due to Point Charges

  • 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


Homework
HOMEWORK

  • P522 1-8&10,13-14 due Tuesday BOP