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Applying AC voltage

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Hi all,
I'm currently studying the electromechanical effects of a water droplet under AC/DC voltages. The water droplet is placed between two rectangular electrodes. I've applied a electric potential to one of the electrodes and grounded the other.
I currently I have no issue simulating DC conditions in electrostatics, however when I simulate AC conditions I encounter a problem. I disable the stationary study and add frequency domain study. Leaving the magnitude in the electric potential, in the study settings I add a frequency of 50Hz. When I compute the simulation there is no electric potential or electric field.
Can someone help. Am I doing this process right or am I missing a step?

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