CUET · PHYSICS · PYQ PAPER 2025
A capacitor has a reactance of 100 \( \Omega \) at 50 Hz. Its reactance at 125 Hz would be
- A 50 \( \Omega \)
- B 30 \( \Omega \)
- C 40 \( \Omega \)
- D 125 \( \Omega \)
Answer & Solution
Correct Answer
(C) 40 \( \Omega \)
Step-by-step Solution
Detailed explanation
\( X_{C2} = X_{C1} \frac{f_1}{f_2} \) \( X_{C2} = 100 \, \Omega \times \frac{50 \, \text{Hz}}{125 \, \text{Hz}} \) \( X_{C2} = 40 \, \Omega \)
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