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GATE Electrical 2014 Set 2 | Question: 54

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A single-phase $SCR$ based $ac$ regulator is feeding power to a load consisting of $5 \Omega$ resistance and $16 \: mH$ inductance. The input supply is $230 \: V$, $50 \: Hz$ ac. The maximum firing angle at which the voltage across the device becomes zero all throughout and the rms value of current through $SCR$, under this operating condition, are

  1. $30^ \circ$ and $46 \: A$
  2. $30^\circ$ and $23 \: A$
  3. $45^\circ$ and $23 \: A$
  4. $45^\circ$ and $32 \: A$

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