29) If the DC output voltage of half wave rectifier is 13.5 volt, then the input AC voltage is

30) In a bridge rectifier, No. of diodes conduct at a time is

31) In Bridge rectifier, how many times of ripple frequency at the output is greater than the input AC frequency ?

32) If the input A.C. frequency is 50 Hz, then the output ripple frequency of the bridge rectifier is

33) If one of the diodes in a full wave bridge rectifier opens, the output is