Final answer:
To join a section of rigid conduit to a section of EMT, you will need a threaded transition coupling.
Step-by-step explanation:
In order to join a section of rigid conduit to a section of EMT (Electrical Metallic Tubing), you will need a connector that is specifically designed for that purpose. This connector is known as a threaded transition coupling. It allows for the secure connection between the rigid conduit and EMT, ensuring a reliable electrical pathway.