3- the power in the a resister is to be controlled by a taped transformer as shown in figure(1)below.Taking the load as 10 the full transformer secondary as 100 with the tappingat70.7 plot a curve of load power against firing delay angle. Determine the required thyristor rating neglect lossesQu 3(a)use the grid provided to display the output voltage waveforms related to the following listings of thyristor phase controlled converters:(1)A single phase fully controlled bridge rectifier with and without a freewheelingdiode.(2) A fully controlled single phase rectifier with a d .c machine load.(3) A 3 phase fully controlled bridge with continurrent.Q 7A single phase half wave rectifiersupplies an RL load in series with aback em.fEb:(1)Derive the general transcendental equation for diode conduction angle Y. sketch the waveforms for output voltage and diode voltage for the general case.(2) IF R=1.0 ohm L=3.0mh and Eb=ov calculate the D.c output volage forSupply of240 v r.m .s.Q 6A single phase bridge inverter is required to produce a pulse width modulated waveform such as shown in the figure(2) above in width = radians:Draw one cycle of the required gate current waveforms for the device of the bridge.(2) draw one cycle of the fundamental component of the load current indicating on it whih devices are conducting during the various interval throughout the cycle.(3) IF=100v what will be the pulse width for an increase in the d.c input voltage required to keep the r.m.s output voltage constant