What is typically used to represent an inductor in TPC schematics?

Inductors in TPC schematics are usually symbolized by coils or loops. This representation effectively conveys the characteristic of inductors, which relies on the coiling of wire to create a magnetic field when electrical current passes through it. The design not only visually differentiates inductors from other components but also reinforces their functional attribute of storing energy in a magnetic field.

The other options do not accurately represent inductors: solid lines with numbers are typically used to indicate connections or paths, while rectangles with labels often signify resistors or other passive components. Triangles with arcs are generally used to denote specific types of devices, such as operational amplifiers or other circuit elements, but they do not convey the unique attributes of inductors. Therefore, using coils or loops is the most effective way to represent an inductor in schematic diagrams.