Transmission lines: a result distributed capacitance and inductance
In electronic theory, circuit elements are assumed to be connected by "wires" which are  idealized as conductors having no resistance, no capacitance, and no inductance. In real systems this will not be true if distributed capacitance and inductance are important. If this is so, the two-conductor signal and return system should be treated as a transmission line. Depending on geometry, the distributed capacitance between signal and return wires is typically 50-100 picofarads (pF) per meter while distributed  inductance is typically a few hundred nanohenries (nH) per meter. 



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