What discovery was made regarding the conductors of an AC circuit?

In an AC circuit, keeping the conductors in close proximity is significant for minimizing impedance. When conductors are positioned close together, it helps to reduce the loop area between them. This close arrangement enhances magnetic coupling and lowers inductance, which is a crucial factor that affects the impedance of the circuit. Consequently, this configuration supports the efficient transfer of alternating current between the conductors.

Impedance not only comprises resistance but also takes into account effects like inductive and capacitive reactance. If the conductors were further apart, it would increase the loop area, leading to a higher inductive reactance and consequently higher overall impedance. Therefore, placing the conductors close together is essential for optimizing circuit performance and ensuring that AC signals can be transmitted with minimal loss and distortion.