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Homework Help: General Questions

  1. Feb 14, 2008 #1
    I'm having trouble answering these questions and i was curious to see how other would answer them:

    If the potential at a point is zero, must the electric field also be zero? (No)
    Give an example.

    How does the energy stored in a capacitor change when a dielectric is inserted if (a) the capacitor is isolated so Q doesn't change, (b) the capacitor remains connected to a battery so V doesn't change.

    If there is a point along the line joining two equal positive charges where the electric field is zero? Where the electric potential is zero? Explain.
  2. jcsd
  3. Feb 15, 2008 #2

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    Homework Helper

    First you should give your answers with your attempts at the explanation, so that we can understand your thoughts on these. Then you'll get all the help needed.
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