Which of the following electrical events shows a sudden drop of power source that can cause a wide variety of problems on a PC or a network?

Question

Options

• ABlackout
• BPower spike
• CPower sag
• DPower surge

• A
  93% (43)
• C
  2% (1)
• D
  4% (2)

Explanation

Blackout is correct because it describes a complete, sudden loss of electrical power - essentially the voltage drops to zero - which can cause data loss, hardware damage from improper shutdowns, and network outages across connected devices.

Power spike (B) is the opposite problem: an extremely brief but intense increase in voltage, not a drop. Power sag (C) is also a voltage drop, but it's a partial and usually temporary reduction (not a complete loss), more like a brief dimming than a full cutoff. Power surge (D) is a sustained or significant rise in voltage above normal levels, again the wrong direction.

Memory tip: Think of a "blackout" as the lights going out entirely - a total power drop to nothing. Spikes and surges both go up (think "spike" = sharp peak, "surge" = wave rising), while a sag sags down partially, and a blackout drops all the way.

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