R Ch 33 Electric Fields & Potential pg 1 Text Qs pg 529 RQ 6-10, 13, 18, 19 Read sec pg 520 & 527

R Ch 33 Electric Fields pg 2 The force field surrounding an electric charge is called an electric field. Electric fields are a vector and have; 1)size 2)direction To test the size & direction of an electric field use a: 1)small test charge 2) positive test charge

R Ch 33 Electric Fields pg 3 The test charge must be small so it doesn’t over-power the field and the test charge must be positive to show the direction. If the positive test charge moves into an electric field, the electric field is ………… If the positive test charge moves out of an electric field, the electric field is …………

R Ch 33 Electric Field Lines pg 4 Electric Field Lines are used to draw an electric field. There are two rules; 1) the closer the lines the stronger the field 2) the arrows always go out of the positive charge into the negative charge, the way the test charge would move.

R Ch 33 Electric Shielding pg 5 Electronic components that are sensitive to charges are shielded with a simple metal cover. The charges will all stay on the outside of the cover because they all are repelling each other and wish to be as far away from each other as possible. Remember gravity cannot be shielded

R Ch 33 Electric Potential Energy or EPE pg 6 Charges have EPE depending on where they are in an electric field.

R Ch 33 Electric Potential or Volts pg 7 EPE is the potential of all the charges Voltage is the potential of a single charge. Voltage measures how much energy it takes to add a single electron into a wire conductor. Voltage is directly related to EPE Voltage is inversely related to charge

R Ch 33 Electric Energy Storage pg 8 Electric energy can be stored in a capacitor (or battery). A capacitor is two thin metal strips separated by a thin plastic insulator. Each metal strip is given a different charge. This creates an electric field that will last forever or until something touches it. If you touch the capacitor in your TV it will kill you the electric field is huge.