IMPEDANCE


Please sign in to view the rest of this entry.

IMPEDANCE
IMPEDANCEIn the study of Ohm's law for dc circuits, it was found that the current in a circuit was equal to the voltage divided by the resistance. In an ac circuit it is necessary to consider capacitive reactance and inductive reactance before the net current in such a circuit can be determined. The combination of resistance, capacitive reactance, and inductive reactance is called impedance, and the formula symbol is Z.It might appear that we could add the capacitive reactance, inductive reactance, and resistance to find the impedance, but this is not true. Remember that capacitive reactance and inductive reactance have opposite effects in an ac circuit. For this reason, to find the total reactance we use the dif…
Citation
Thomas K. Eismin: Aircraft Electricity and Electronics, Sixth Edition. IMPEDANCE, Chapter (McGraw-Hill Professional, 2014), AccessEngineering Export