physics

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How much work does the electric field do in moving a proton from a point with a potential of +120 V to a point where it is -60 V? Express your answer in joules.

I've looked through my notes, and I'm sure the answer is really easy, but I'm not seeing it.

I know that Work(Wba)= PEa - PEb and that
Electrical Potential Vba = (Vb - Va)/q where q is the charge.

I'm sorry, I think i've just confused myself and I keep trying to relate equations but it's not working.

  • physics -

    Your notes are wrong on the second equation

    Work=Force*distance= Eqd= (Va-Vb) q

    The difference in potential is 180volts, q is the charge on an electron.

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