Question $3$:

A $3-$phase half$-$wave controlled rectifier is supplying a pure resistive load of $\backslash (20\backslash$Omega $\backslash )$ from a $3-$phase star connected supply of $380$ V line $($phase$-$to$-$phase$)$ voltage, $50$ Hz $.$ The firing angle of thyristors is $\backslash (60^\{\backslash$circ$\}\backslash ).($Assume the circuit is ideal.$)$

a$.$ Sketch the output voltage and output current waveforms

b$.$ Sketch the source $($ AC side$)$ current for one phase

c$.$ Calculate the RMS value of source current.

d$.$ Find the CF $($Crest Factor$)$ of source current

PLEASE SOLVE CLEARLY AND TRULY according to the picture.