Which of the following is an electrical event shows that there is enough power on the grid to
prevent from a total power loss but there is no enough power to meet the current electrical
demand?
A.
Power Surge
B.
Power Spike
C.
Blackout
D.
Brownout
Explanation:
A brownout shows that the demand of the electrical power exceeds the capability of
the electrical power supply system and reduces the
voltage for everyone. It indicates there is enough power on the grid to prevent blackout or a total
power loss but there is not enough power
to meet the current electrical demand. It frequently occurs during informal weather conditions such
as suddenly cold or hot spell. Brownouts
are quite harder for computer equipments than blackouts. A brownout lasts longer than a power sag
and corrupts more data.
Answer option C is incorrect. A blackout indicates a complete loss of PC’s electrical source. It is an
event that shows a sudden drop-off powersource, which 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 A 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.