A single phase full-wave half-controlled bridge converter feeds an inductive load. The two SCRs in the converter are connected to a common DC bus. The converter has to have a free-wheeling diode-
1) Because the converter inherently does not provide for freewheeling
2) Because the converter does not provide for freewheeling for high values of triggering angles
3) Or else the free-wheeling action of the converter will cause shorting of the AC supply
4) Or else if a gate pulse to one of the SCRs is missed, it will subsequently cause a high load current in the other SCR