Which component in a circuit is typically operated manually?

A pushbutton switch is specifically designed for manual operation, allowing an operator to control the flow of electricity in a circuit by pressing it. This type of switch serves as a simple interface for electrical devices, enabling users to start or stop a function, such as turning on lights or machinery, with their hand. The physical interaction required to operate the switch emphasizes its manual nature.

In comparison, other components like contactors and relays typically function automatically in response to electrical signals or conditions in the circuit, and a float switch, which detects liquid levels and activates based on that level, also operates without direct manual input. This characteristic of the pushbutton switch highlights its role as a straightforward and intuitive way for users to interact directly with electrical systems.