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Potential energy and electric potential

  1. Oct 24, 2012 #1
    What is the difference between electric potential and electric potential energy?

    How can i answer to that question in full correct way?

    attempt:

    While potential energy is associated with a conservative force that acts on a particle when it moves from A to B, the electric potential is the amount of work done per unit charge to move a chargefrom the point A to B , without changing the kinetic energy.
     
    Last edited: Oct 24, 2012
  2. jcsd
  3. Oct 24, 2012 #2
    one is exerted by a conservative force, the other is exerted by a conservative force per unit charge.
     
  4. Oct 24, 2012 #3

    ehild

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    What you said is the change of potential/ potential energy between points A and B.

    The electric potential at point A is the work needed to move an unit positive charge from the point of zero potential to A. The electric potential energy of a charged body is the work needed to move a charged body (with charge q) from the point of zero potential to A, in the same electric field. What is the difference between the work in both cases?


    ehild
     
  5. Oct 24, 2012 #4

    ehild

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    That conservative force is the force of the electric field on the charged body, how does it depend on the charge?

    ehild
     
  6. Oct 24, 2012 #5
    In U we have ΔU = -W


    but because ΔV is the work per unit charge, then

    ΔV*q= -W
     
  7. Oct 24, 2012 #6

    ehild

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    Correct. So the potential energy of a charged body is equal to the potential at its place multiplied by the charge.

    Potential is an attribute of the electric field. Potential energy is attributed to the charged body.

    ehild
     
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