Which of the following is a power-dependent failure mechanism?

The correct choice highlights bulk breakdown as a power-dependent failure mechanism. This phenomenon occurs primarily in dielectrics, where excessive voltage or current can lead to the material’s dielectric strength being exceeded. When this threshold is surpassed, a conductive path can form through the substance, resulting in a bulk breakdown. It is characterized by large-scale failure and can cause catastrophic damage to electronic components when exposed to high voltage levels.

In contrast, signal interference pertains to the disruption of signal integrity, often caused by electromagnetic interference or crosstalk, and does not rely on power levels. Component aging relates to the gradual degradation of components over time due to factors such as temperature and environmental conditions, rather than immediate power influences. Material fatigue involves the gradual weakening of materials due to cyclic loading, which is also not directly linked to power levels. Understanding the nuances of these failure mechanisms is essential for effective corrosion control and overall avionics reliability.