With increase in firing angle,
Correct answer: B. Harmonic distortion increases and quality of input current decreases
- A. Both harmonic distortion and quality of input current increases
- B. Harmonic distortion increases and quality of input current decreases
- C. Harmonic distortion decreases and quality of input current increases
- D. Both harmonic distortion and quality of input current decreases
Explanation
Increasing the firing angle chops more of the supply waveform, increasing harmonic distortion. The input current waveform consequently becomes poorer in quality, so option b follows.
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