To find the Ipc (cathodic peak current) from a voltammogram, one must identify the maximum point of the peak on the current vs. potential graph. This involves analyzing the data, typically arranged in columns, to pinpoint the peak current value accurately. Using Excel can facilitate this process by allowing for data manipulation and peak identification through graphing functions. The discussion emphasizes that finding Ipc is closely related to determining the maximum point of the peak. Accurate identification of these values is crucial for proper analysis in cyclic voltammetry.