What type of file typically contains a part in Autodesk Inventor?

In Autodesk Inventor, the file type that typically contains a part is the .ipt file. This format is specifically designed for representing individual parts in the Inventor environment, allowing users to create, modify, and manage 3D models of mechanical components. The .ipt file holds data about the geometry, features, and parameters of the part, making it essential for detailed design work.

The other file types serve different functions within the Autodesk ecosystem. For instance, .iam files are used for assembly drawings which combine multiple parts or subassemblies into one cohesive model. The .dwg file format is associated with 2D drawings, commonly used in AutoCAD but not specifically for parts in Inventor. Lastly, the .obj file is a file format used for 3D models that can be imported into various 3D applications but isn't native to Autodesk Inventor's part modeling workflow. Thus, the .ipt file is the correct and relevant choice for parts within Inventor.