Taking the vector E out of the Electric potential equation

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casanova2528
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the Electric field depends on the distance between the electric source and the point of measurement. Why can you take E out of the integral V = E dot dr? After all, E can't be constant from infinity to r sub zero...right? Is the integral supposed to be an approximate value?

need some assistance.
 

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oh, I get it now...it was for a uniform field. never mind.
 

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