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## Main Question or Discussion Point

Hello,

I have electrophysiological data from an array of electrodes. I know the locations of the recording tips of the electrodes. Starting with voltage, I'd like to estimate the electric/magnetic fields around the electrodes.

I'm unsure when it's okay to approximate E=-V/d. That is going from time-series of voltages from positions in space I don't know how to tell if curl(E)=0.

Is there a rule of thumb for when electrostatics equations are okay? How do I calculate curl(E) from data like mine?

Thanks so much.

I have electrophysiological data from an array of electrodes. I know the locations of the recording tips of the electrodes. Starting with voltage, I'd like to estimate the electric/magnetic fields around the electrodes.

I'm unsure when it's okay to approximate E=-V/d. That is going from time-series of voltages from positions in space I don't know how to tell if curl(E)=0.

Is there a rule of thumb for when electrostatics equations are okay? How do I calculate curl(E) from data like mine?

Thanks so much.