An RL high-pass filter consists of a 470 Ω resistor and a 600 mH coil. The output is taken across the coil. The circuit's critical frequency is___________?
Correct answer: A. 125 Hz
- A. 125 Hz
- B. 1,250 Hz
- C. 564 Hz
- D. 5,644 Hz
Explanation
For an RL high-pass circuit with output across the coil, the critical frequency is f_c = R/(2πL) = 470/(2π × 0.6) ≈ 125 Hz. Hence option a is correct.
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