What does a surge protector do?

A surge protector is designed to safeguard electrical devices from voltage spikes that can occur due to various factors, such as lightning strikes, power outages, or fluctuations in the electrical supply. When there is a sudden increase in voltage, the surge protector diverts or limits this excess voltage, preventing it from reaching the connected devices. By doing so, it minimizes the risk of damage to sensitive electronics and prolongs their lifespan, making it critical for protecting computers, TVs, and other gear from power surges.

The other choices do not accurately describe the function of a surge protector. For instance, increasing voltage supplied or enhancing energy efficiency is not within the primary function of a surge protector. Additionally, converting alternating current (AC) to direct current (DC) pertains to the function of a rectifier, not a surge protector.