Impedance, however, does not equal the sum of resistance and reactance.
What is the impedance if the voltage of the line is 115 volts?
The impedance of its secondary will be a quarter of this or 3,000 ohms.
The impedance of the coil I is changed by moving its adjustable core.
Impedance depends chiefly upon the frequency of alternation.
An important factor in the design ...