A single-phase AC regulator with an inductance load has

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A single-phase AC regulator with an inductance load has following details :
Source voltage, 230 V, at a frequency of 50 Hz and ω L = 5 ohms.
The control range of the firing angle is

1. 0 < α < π
2. π ≤ α ≤ π
  2
3. 0 ≤ α < π
  2
4. π < α < π
  2

Correct Option: B

NA