Which of the following statements is true about a brownout?

A.
It is the situation of voltage drop in power supply.

B.
It supplies power to the devices in case of a power failure.

C.
It is a brief decrease in voltage at the power source.

D.
It is a device used to filter out the effects of voltage spikes and surges.

Explanation:

A brownout is the situation of voltage drop in power supply. The overloading of a primary power
source can cause brownouts.
Answer option D is incorrect. The surge protector is a device used to smooth out power variations by
filtering out the effects of voltage spikes and surges that are present in commercial power sources.
Answer option C is incorrect. Sag is a brief decrease in voltage at the power source.
Answer option B is incorrect. Uninterrupted Power Supply (UPS) continues to supply power to the
devices in case of power failure.
What is UPS?
Uninterruptible power supply (UPS) is a device that allows a computer to keep running for a short
period of time in case of power failure or low voltage, using battery backup. It also provides

protection against power surges. When power surge occurs, only the UPS charging circuit is affected,
while the computer gets normal power.