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Potential between two plates, voltage given watch

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    To find the magnitude of the force on an ion due to the electric field between two plates, one marked +200V and the other marked -200V, do I use E=V/d, F=QE=QV/d, where V=400?
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    (Original post by bbrain)
    To find the magnitude of the force on an ion due to the electric field between two plates, one marked +200V and the other marked -200V, do I use E=V/d, F=QE=QV/d, where V=400?
    Yes, that's correct.
 
 
 
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