Total resistance to current flow in a reactive circuit is called what?

The total resistance to current flow in a reactive circuit is referred to as impedance. Impedance is a comprehensive measure that combines both resistance (the opposition to current from resistors) and reactance (the opposition to current flow from capacitors and inductors). In AC circuits, where both resistance and reactance are present, impedance is a vital concept that describes how much the circuit resists the flow of electric current at a particular frequency.

Resistivity, on the other hand, is a property of materials that quantifies how strongly they resist the flow of electric current, but it does not specifically pertain to reactive circuits. Capacitance is the ability of a component to store an electric charge, and inductance is the property of a circuit that opposes changes in current. Neither of these concepts directly relates to the total opposition to current flow in a reactive circuit, which is why impedance stands out as the correct answer.