Is Time-Dependent Electric Current Simulation Possible in COMSOL?

ajaymohan251
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TL;DR
In this COMSOL model, I have a part given potential (-800v) while the other is grounded.

Does anyone have an idea on how to change the potential alternately from +800v to -800v with a waveform function?

V0*wv1(sin(f*t))

Does this equation satisfy this query with a frequency given as 2.81 MHz?

Any suggestions?

This is actually for a particle tracing to be done further for a proton.
Kindly find the images for better understanding.
Electric potensial.pngMaterials with Copper.png
particle trajectory with -800v potensial.png
 
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You'll have to use a model that allows for time-dependent solutions, probably Electric Currents in your case.
 
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