To be correct for ac and dc, the title should say “… find the path of least impedance”. Which is resistance and reactance combined (capacitance or inductance).

To be correct for ac and dc, the title should say “… find the path of least impedance”. Which is resistance and reactance combined (capacitance or inductance). Also to be clear: they are not talking about 50/60 hz ac signal which will follow a path basically exactly like dc on a pcb, but much higher frequencies.