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Electric Field Question 
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#1
Dec1712, 08:25 PM

P: 25

For the equation ε=ΔV/r, does this work only between 2 parallel plates or would it work for point charges as well?



#2
Dec1812, 05:38 AM

P: 3,151



#3
Dec1812, 07:25 AM

P: 72

I love Electrostatics <3



#4
Dec1812, 10:26 AM

P: 887

Electric Field Question
Do you know calculus? Your equation seems to be another way of writing [itex]E = \Delta V/\Delta r[/itex], which is only an approximation. The correct value is gotten by taking the limit as Delta goes to 0. Then you get:
[itex]E=\nabla V[/itex] In the special case of infinite parallel plate, they give the same answer, but for a curved E field you get a more accurate answer for smaller step size. 


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