Single Phase Full Wave Mid-point Converter with R Load and RL Load

A single-phase full wave mid-point type rectifier and bridge type requires how many thyristors?
If the maximum value of applied voltage for a full-wave center tapped (M-2) rectifier is 30 V, find the magnitude of ripple voltage?
The angle of conduction in silicon-controlled rectifiers circuit changed by which voltage?
A single phase full wave mid-point SCR converter, uses a 230/200 V transformer with the centre tap on the secondary side. How much is P.I.V. per SCR?
A single phase mid-point full-wave SCR converter with maximum mid-point voltage of Vm volts. How much average output voltage across a resistive load is developed at firing delay angles of 0 and π/2 rad?