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Electric Field

Electric Field. A charged object will set up an electric field in the space around it electric field = a region where an electric force on a test charge can be detected. Electric field is a vector quantity

rajah-decker
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Electric Field

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  1. Electric Field • A charged object will set up an electric field in the space around it • electric field = a region where an electric force on a test charge can be detected

  2. Electric field is a vector quantity • By convention, the direction of E is the direction of the electric force experienced by a positivetest charge at that point

  3. Electric Field Strength Units = ?

  4. What electric force does q0 experience if it is 2.0 m away from the +1.0 C charge? • What is the electric field at q0? • Find the electric field if q0= −2.0 nC. +2.0 nC +1.0 C

  5. Electric Field Strength

  6. Practice An electron placed in an electric field experiences a force of 8.0×10-15 N directed to the right. Find the magnitude and direction of the electric field at that point.

  7. Practice Find the electric field required to suspend an electron (m=9.1×10-31 kg) in air – find both magnitude and direction.

  8. Electric Field Lines • Electric field lines do not really exist – they just represent the electric field at different points • Strength of E– number of field lines (stronger where lines are close together) • Direction of E – tangent to the lines at each point

  9. Interpret Electric Field Lines • Direction of lines • Lines are closer together in the center

  10. Interpret Electric Field Lines • Compare the magnitudes of the charges • Where is the electric field strongest? • Where would an object experience the greatest force?

  11. Interpret Electric Field Lines • Compare the magnitudes of the charges

  12. Interpret Electric Field Lines • Compare the magnitudes of the charges • Where is the electric field strongest?

  13. Draw Electric Field Lines

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