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Electric fields - from single charge to charged plates

Electric fields - from single charge to charged plates. Mr Ang JL 27 Feb 2010. Creating the slides. Using the Java applet simulation from http://phet.colorado.edu/simulations/sims.php?sim=Charges_and_Fields The simulation allows the user

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Electric fields - from single charge to charged plates

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  1. Electric fields- from single charge to charged plates Mr Ang JL 27 Feb 2010

  2. Creating the slides • Using the Java applet simulation fromhttp://phet.colorado.edu/simulations/sims.php?sim=Charges_and_Fields • The simulation allows the user • to view the electric field around a charge or charges, and • explore electric force on a positive test charge

  3. Electric field of a single charge

  4. Two positive test charges are placed near it. • The arrows indicate the direction of the forces. • The length of the arrows indicate the strength of the force

  5. The small arrows around the positive charge represent the electric field • Direction & • Magnitude (the fainter the weaker the field) • Electric field is a vector A radial field

  6. Electric field of a few charges

  7. For two neighbouring like charges, the fields “cancel” each other in the region between them, so it appears to be “horizontal”, instead of radial

  8. Bringing the two neighbouring like charges closer, the “canceling” effect become clearer.

  9. Adding more like charges, observe that the field “lines” are perpendicular to each row of like charges. • Near the ends of each row, the field is more radial

  10. Bringing the two rows of charges closer, does the field look like that for two charged plates?

  11. A uniform field between two charged plates

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