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?
A.
Blackout
B.
Power spike
C.
Power sag
D.
Power surge
Explanation:
A blackout indicates a complete loss of PC’s electrical source. It is an event that shows
a sudden drop of power source that can cause a wide
variety of problems on a PC or a network. A blackout is not a power failure over an entire area but it
can be in a section or a part of a building,
city, or any other larger area. It is caused by electrical storms, traffic accidents in utility poles, or a
total collapse of the power system due to
demand overload.
Answer option D is incorrect. Power surge is a sharp increase in the voltage or an over voltage
event. It is a short and temporary increase in
voltage on the power grid and it is like a rough wave. Different types of electrical disturbance such as
lightning storm, distant lightning strikes,
or problems on the electrical power supply grid can cause the voltage to suddenly increase.
Answer option B is incorrect. A power spike is a sudden isolated extremely high over voltage event
on an electrical line. The primary cause of
the power spike is lightning strikes. Lightning carries millions of volts, and if a home or office takes a
direct hit, a PC along with other devices
are likely to be heavily damaged. Direct striking is a rare event but a strike within a mile can create a
sudden spike in the electrical current
near the strike.