Exam Question

(a) Explain the applications of PN junction diode (6)

(b) A full-wave, 1-phase rectifier employs a double diode valve, the internal resistance of each element of which may be assumed constant at 500W. The transformer r.m.s secondry voltage from teh centre-tap to each anode is 300V and the load has a resistance of 2000W. Evaluate (10)

(i) Mean load current.

(ii) r.m.s value of load current

(iii) The d.c. output power

(iv) The input power to the anode circuit

(v) The rectification efficiency