What is the primary function of a UPS?

The primary function of a UPS, which stands for Uninterruptible Power Supply, is to provide a backup power source to electronic devices in the event of a power outage or electrical disturbance. This equipment ensures that devices such as computers, servers, and other critical systems remain operational, preventing data loss and hardware damage that could occur during sudden power interruptions.

A UPS achieves this by utilizing batteries that can automatically engage when the main power supply fails, allowing for a seamless transition and giving users time to save their work and shut down equipment safely if necessary. Additionally, many UPS systems provide surge protection, protecting devices from voltage spikes that could cause damage.

The other options do not accurately reflect the common terminology or function associated with power backup systems. For example, while "Universal Power System" and "Universal Power Supply" might sound plausible, they are not standard terms recognized in the industry. Similarly, "Unidirectional Power Source" does not capture the critical aspect of providing backup power during outages, which is the essence of a UPS.