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Physics Core/AP 1 and 2

Chapter 17: 1-6

Course Materials are always under revision! Weblecture content may change anytime prior to two weeks before scheduled chat session for content.

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Homework

Physics 17: 1-6 Electric Potential

Homework

Reading Preparation

Text Reading: Giancoli, Physics - Principles with Applications, Chapter 17: Sections 1 to 6

Study Points

Key Equations

  • Work in an electric field: W   =   Fd   =   qEd  
  • Potential difference between two points in an electric field Δ PE   =   qED   =   W
  • Electric potential at a single point V a   =   PE a q
  • Electric potential between two points Δ V   =   PE b     PE a q   =   W q
  • Electric field and electric potential E   =   Δ V d
  • Point charge electric potential V   =   k Q R   =   1 4 π ϵ 0   Q R
  • Dipole Potential at r from field due to two particles with equal but opposite charge Q separated by distance l V   kp   cos   θ r 2   where   p   =   dipole   moment   =   Ql  

Web Lecture

Read the following weblecture before chat: Electric Potential

Study Activity

Return to the charges and fields lab. This time, use the simulation to explore how voltages vary as you introduce new charges and move them around. Turn on the grid so that you can precisely place charges. Use the sensors to display net field direction and force values along with voltages at specific points. What is the potental difference (voltage) when you

  • Place a +10 nC primary charge at the center of the display and add a +1 nC test charge one space unit (5 small units) away?
  • Place a +10 nC primary charge at the center of the display and add a -1 nC test charge one space unit (5 small units) away?
  • What happens if you double the primary charge?
  • Place a +1 nC charge and a -1 nC charge 1 small unit apart and use the sensor to measure the dipole field around the two charges.

Physics simulation Java Applets are the product of the PHET Interactive Simulations project at the University of Colorado, Boulder.

Chat Preparation Activities

Chapter Quiz

Lab Work

If you want lab credit for this course, you must complete at least 12 labs (honors course) or 18 labs (AP students). One or more lab exercises are posted for each chapter as part of the homework assignment. We will be reviewing lab work at regular intervals, so do not get behind!