1 / 10

Chapter 18 Electric Energy and Capacitance

Chapter 18 Electric Energy and Capacitance. demonstrations. Electric Potential Energy.  PE= -qE  d PE electric = -qEd charge electric field strength displacement from a reference point in the direction of the field Only for a uniform field Another type of Mechanical Energy. +. +.

vaughan
Download Presentation

Chapter 18 Electric Energy and Capacitance

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 18 Electric Energy and Capacitance demonstrations

  2. Electric Potential Energy • PE= -qEd • PEelectric= -qEd charge electric field strength displacement from a reference point in the direction of the field • Only for a uniform field • Another type of Mechanical Energy

  3. + + Positive charge moves d through a uniform field Figure 18-2 from p667 E d

  4. h Potential Energy: Electric vs Gravity  PEgravity = mg  h PEelectric = -qE  d m d earth

  5. Unit analysis PE= -qEd • joules = coulombs newtons/coulomb meters • E is sometimes in so and so

  6. Potential Difference • Potential difference is the change in electric potential measured in volts • V = • V=-E d Units: volts=J/C Units: volts= *m

  7. Potential Difference in Charges and Fields sim -4.4 V 2.2 V/m

  8. Capacitors • Device that stores charge • Capacitance is a measure of the ability to store energy in the form of separated charges

  9. Capacitance Equations Q = total charge Units: farads = C/V 0 = permittivity constant (C2/Nm2) A = area of plate d = Distance between plates

  10. Energy and CapacitorsEquations

More Related