Which of the following is an example of an electrical connector?

A terminal block serves as an example of an electrical connector because it is specifically designed to facilitate the joining of electrical wires or circuits. Terminal blocks provide a secure and organized way to connect different wires, ensuring that electrical connections are reliable and can be easily managed. They are commonly used in various electrical installations to simplify the wiring process.

In contrast, a ground rod is primarily used to provide a connection to the earth for grounding purposes and does not function as a connector for multiple wires. A resistor, while it is a component used to limit current within a circuit, does not connect wires but rather alters the flow of electricity. A transformer, on the other hand, is used to change the voltage level in an AC circuit but does not serve as a connector itself. Each of these components has distinct roles in an electrical system that differ from the function of a terminal block.