Which of the following is a common type of electrical connector?

Plugs are indeed a common type of electrical connector primarily used to connect electrical devices or cords to a power source. They consist of pins that fit into a socket or receptacle, facilitating the flow of electrical current. This makes them essential for powering various devices, from household appliances to industrial machinery.

The fundamental role of plugs extends beyond mere connection; they ensure safety and facilitate disconnection without exposing live wires. The design and standardization of plugs vary across different regions and applications, yet their core function remains the same.

In contrast, the other options such as fuses, transformers, and inverters serve different purposes within electrical systems. Fuses are protective devices that interrupt excessive current flow, transformers change voltage levels, and inverters convert DC to AC power. None of these serve as connectors in the way plugs do.