Process of determining the capacitive reactance in a circuit.

Process of determining the capacitive reactance in a circuit.

• A. Calculation of Capacitive Reactance
• B. Correct Operation of Capacitors
• C. Electrolytic Capacitors
• D. Inductors

Answer: (A)

Understanding how to determine capacitive reactance is about calculating the impedance a capacitor presents to AC. The key relation is Xc = 1/(2π f C). Here, you identify the AC frequency and the capacitor’s value, then plug them in to get the magnitude of the reactance in ohms. This shows the dependence: Xc decreases as frequency or capacitance increases, and at DC (f = 0) the reactance is infinite while at very high frequencies it becomes very small. The best answer matches this calculation-focused approach, rather than describing how capacitors should operate, naming a capacitor type, or pointing to inductors.

Understanding how to determine capacitive reactance is about calculating the impedance a capacitor presents to AC. The key relation is Xc = 1/(2π f C). Here, you identify the AC frequency and the capacitor’s value, then plug them in to get the magnitude of the reactance in ohms. This shows the dependence: Xc decreases as frequency or capacitance increases, and at DC (f = 0) the reactance is infinite while at very high frequencies it becomes very small. The best answer matches this calculation-focused approach, rather than describing how capacitors should operate, naming a capacitor type, or pointing to inductors.