1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Voltage at a spot where the force on a charge is zero

  1. Feb 25, 2014 #1
    Suppose you have a system of charges on the xy plane. Am i correct in saying that the place where you have zero volts, is the place where you can put a charge and it WONT move?
  2. jcsd
  3. Feb 25, 2014 #2


    User Avatar
    Science Advisor
    Homework Helper

    hi oneplusone! :smile:

    where the field is zero, it won't move (field is force per charge)

    zero volts doesn't really imply anything

    voltage is electric potential energy (per charge) …

    like gravitational potential energy, you can choose anywhere to be zero …

    and if you put something where the gravitational potential is zero, that won't stop it falling! :rolleyes:
  4. Feb 25, 2014 #3


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    Using an example to put it another way:

    Suppose you have a hill that rises above sea-level, and it is next to a valley that is below sea-level. Somewhere on that downhill slope that goes from above to below sea-level, we place a ball. The ball does not stay in place, but actually rolls down the hill.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook