If the a.c. input to a half-wave rectifier is an r.m.s value of 400/√2 volts, then diode PIV rating is__________________? December 19, 2018 – by admin If the a.c. input to a half-wave rectifier is an r.m.s value of 400/√2 volts, then diode PIV rating is__________________? A. 400/√2 VB. 400 V C. 400 x √2 V D. none of the above