What is the term for the opposition to alternating current caused by the combined effect of reactance and resistance?

Resistance opposes both DC and AC, while reactance opposes AC specifically due to capacitance or inductance. When you combine both resistance and reactance in an alternating current (AC) circuit, the total overall opposition to the flow of current is called impedance. Impedance is measured in ohms, just like its individual components (resistance and reactance), and is typically represented by the letter Z. Distractors like admittance and conductance refer to how easily current flows, not how it is opposed.