Page 1081 | Volume 4 | Chapter 47 | Alternating Current Diagrams
In some problems it is required to find the impedance of a circuit in which the ohmic and spurious resistances are given. This is done in a manner similar to finding the impressed pressure.
Ohmic resistance and spurious resistance or inductance reactance both tend to reduce an alternating current. Their
combined action or impedance is equal to the square root of the sum of their squares, that is,
impedance = √resistance2 + reactance2
This relation is represented graphically by the side of a right angle triangle as in fig. 1,322, in which the hypothenuse corresponds to the impedance, and the sides to the resistance and reactance.
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