A prolonged high voltage is a:
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A. B. C. D.C.
A prolonged high voltage is a surge.
From: HARRIS, Shon, All-In-One CISSP Certification Exam Guide, 3rd.
Edition McGraw-Hill/Osborne, 2005, page 368.
A prolonged high voltage is referred to as a "surge". A surge is a brief and sudden increase in electrical power, typically lasting less than a second. It is usually caused by a sudden release of energy, such as lightning strikes, power outages, or when electrical equipment is turned on or off.
In contrast to a "spike," which is a sudden and brief increase in voltage that typically lasts for microseconds or milliseconds, a surge is a more sustained increase in voltage that can last for several seconds or even minutes.
A "blackout" is a complete loss of electrical power, usually caused by a fault in the power grid or equipment. It results in a total power loss for a significant area or region.
A "fault" is a malfunction in an electrical system, typically caused by a defect or damage to electrical equipment or wiring. It can lead to power outages, surges, or other electrical problems.
In summary, a prolonged high voltage is a "surge," which is a sustained increase in voltage that can last for several seconds or even minutes. It is different from a "spike," which is a sudden and brief increase in voltage that typically lasts for microseconds or milliseconds, a "blackout," which is a complete loss of electrical power, or a "fault," which is a malfunction in an electrical system.