A similar method can also be used with a voltmeter by remembering that impedance is a form of resistance.
And also reactance is a form of resistance.
Normally a resistor doesn't change value with frequency.
When you use a generator, that is variable, you can determine the reactance by hooking the unknown resistor, inductor, capacitor in series with a variable resistor.
When the unknown component voltage drop is read with a volt meter, the variable resistor is then adjusted till the variable resistor reads the same voltage as the unknown component.
When the voltages that are measured are found to be the same, the voltage then says that the resistance and the reactance is the same. So now without changing the variable resistor, measure the adjusted resistance.
This resistance value will be the same as the reactance value, because resistance value doesn't change with frequency normally.
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