BPSC 70th Prelims Re Exam Held on 4 Jan 2025

Concept:Capacitive reactance ($X_c$) measures opposition to alternating current flow. It depends on frequency ($f$) and capacitance ($C$).Explanation:The formula is $X_c = \frac{1}{2\pi f C}$.As frequency increases, the denominator increases, so $X_c$ decreases.This means $X_c$ is inversely proportional to frequency, not directly or to square root.Thus, only option 3 matches this relationship.Answer:Option 3 – Inversely proportional to frequency