What characteristic is associated with a cathode electrode?

The characteristic associated with a cathode electrode is that it has a negative charge. In electrochemistry, the cathode is the electrode where reduction occurs, which means it gains electrons. Since electrons carry a negative charge, this results in the overall negative charge of the cathode. In practical terms, when a circuit is active, the cathode is typically connected to power sources in a way that allows it to attract cations (positive ions) towards it, reinforcing its negative polarity.

The other options do not accurately describe the cathode: a positive charge or neutral charge would be associated with the anode where oxidation takes place, and high resistance does not define the current or charge characteristics in this context. The fundamental principle of the cathode’s function in an electrochemical cell revolves around its negative charge, making it crucial for the processes of charge transfer and electron flow.