The following distortion readings are available for a power amplifier. D2 = 0.2, D3 = 0.02 and D4 = 0.06. The Total Harmonic Distortion (THD) is
- A. 30.97%
- B. 20.97%
- C. 15.67%
- D. 13.29%
Answer: B. 20.97%
Explanation: Total Harmonic Distortion THD = √(D2² + D3² + D4²) = √(0.2² + 0.02² + 0.06²) = √(0.04 + 0.0004 + 0.0036) = √0.044 ≈ 0.20976 = 20.97%.