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OpenStudy (anonymous):

how can we get electric field from electric potential?

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OpenStudy (experimentx):

Let V be your electric potential and E be your electric field, \[ \vec E =-\vec \nabla V \] Where \[ \nabla = \vec i \frac{\delta}{\delta x} + \vec j \frac{\delta}{\delta y} + \vec k \frac{\delta}{\delta z} \]

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