Final answer:
The size of the main common-return conductor for a pipe organ's electromagnetic supply must meet the standards based on electrical codes, considering factors like current and voltage. Conductivity of the pipe affects the system due to induced eddy currents, while superconducting materials provide lossless conduction.
Step-by-step explanation:
The main common-return conductor in electromagnetic supply for a pipe organ, or in any application where electrical circuits are employed, needs to adhere to specific standards for safety and functionality set by regulations.
In the case of an electromagnetic supply system for a pipe organ, which might be considered part of a unique or specialized application, the specifications such as the minimum size of the common-return conductor, are often dictated by the system's design and country-specific electrical codes.
These codes take into account factors such as current, voltage, distance, and potential losses to ensure that all components are safe and efficient in their operation.
In considering whether a pipe serves as a conductor, which directly influences the functioning and magnetic effects within the system, a conducting pipe would affect the magnetic field around the coil due to eddy currents induced in the conductor.
The design might thus need to account for these effects, otherwise, it could lead to inefficient operation or overheating. Superconducting materials would not have this issue, as they would allow current to flow without resistance, leading to no power dissipation compared to conventional conductors like a copper wire.