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A single phase ac regulator fed from 50 Hz system supplies a load having resistance and inductance of 4.0 ohms and 12.73 mH respectively. The control range of firing angle is
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- 0° < α < 180°
- 45° < α < 180°
- 90° < α < 180°
- 0° < α < 45°
Correct Option: B
| tan φ = | = | ≈ 1 | ||
| 20 | 4 |
⇒ φ = 45°
Hence, α should be greater than φ.
