519. As shown in figure «A» of the illustration, what would be the circuit impedance if the capacitive reactance is 10 ohms and the resistance is 10 ohms

The circuit impedance in a series resistor-capacitor circuit is calculated using the Pythagorean theorem: Z = √(R2 + Xc2). With a resistance of 10 ohms and a capacitive reactance of 10 ohms, the impedance is √(102 + 102) = √200 ≈ 14.14 ohms. Since the circuit contains only a capacitor, the impedance is capacitive, resulting in a final answer of 14.14 ohms capacitive.