What type of switch operates when the electromagnet is energized?

The correct answer is that the switch operates as a closed switch when the electromagnet is energized. In electromagnetic switch mechanisms, the energization of the electromagnet creates a magnetic field that pulls a movable conductor, which in turn closes the switch. This allows current to flow through the circuit, completing the connection and enabling the operation of connected devices or systems.

In contrast, an open switch would prevent current flow, which is not the case here since the electromagnet's activation is specifically designed to close the circuit. A bypass switch typically allows current to flow through an alternate pathway without being influenced by the primary switch mechanism. A manual switch relies on user intervention to close or open the circuit and does not depend on electromagnetic principles. Thus, the functioning of the switch in question aligns specifically with the properties of a closed switch that is activated through electromagnetism.