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Electrostatic EMERGENCYYY HELP

  1. Jun 7, 2010 #1
    1. The problem statement, all variables and given/known data
    An electron beam in the TV tube is steered across the screen by the field between two charged plates. If the electron experiences a force of 3.ox10(to the negative 6th)N, how large is the field between the deflection plates?



    2. The problem statement, all variables and given/known data
    The custodian dusts off a globe with a duster, causing the globe to acquire a charge of -8.0x10(to the negative 9th)C. What is the magnitude and direction of the electric field at a point 0.40m from the center of the charged globe?
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Jun 7, 2010 #2
    For number one: What is the force on a point particle with charge q in a uniform field E?

    For number two: Assuming the charge distributes uniformly over the sphere, what simplification can you make? Think Gauss's law.
     
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