Final answer:
In a purely capacitive load, the resistance R is zero ohm, and the capacitive reactance Xc is greater than zero ohm, representing the opposition to AC due to capacitance.
Step-by-step explanation:
For a purely capacitive load, R is 0 (ohm, representing resistance) and Xc > 0 (ohm, representing capacitive reactance). In an ideal capacitive load, there is no resistance, meaning that there's no resistive losses as electrical energy is stored in the electric field of the capacitor. The capacitive reactance (Xc) is the opposition a capacitor presents to alternating current (AC) due to its capacitance and is determined by the formula Xc = 1/(2πfC), where f is the frequency of the AC and C is the capacitance.
In the context of an RLC circuit, it's essential to understand that the impedance (Z) of the circuit is calculated by the formula Z = √R²+(XL-Xc)², where XL is the inductive reactance. For a purely capacitive load, R is taken as 0, simplifying the calculation of impedance to just account for the capacitive reactance (Xc).