What happens to the relay contacts if they become pitted frequently?

When relay contacts become pitted frequently, they can fail to conduct properly due to the degradation of the contact surface. Pitting occurs as a result of electrical arcs that form when the relay operates; these arcs can erode the material of the contacts, leaving behind small craters or pits. Over time, the accumulated pitting interrupts the smooth contact surface needed for effective conductivity.

This degradation results in higher resistance at the contact points, which can lead to inadequate current flow when the relay is activated. Poor conductivity may also increase the likelihood of overheating and additional deterioration, contributing to a cycle of failure. In this context, ensuring that relay contacts remain in good condition is critical for the reliable operation of electrical systems.

Other options suggest outcomes that do not align with the effects of frequent pitting. For instance, becoming more efficient or providing better contact are contrary to the reality of pitting; the contact quality deteriorates rather than improves. Additionally, while burning out quickly could occur as a consequence of failure, the more direct effect of frequent pitting is the loss of proper conductivity.