ETO ETO Exam papers 📅 Jun 2023

Exam Question

(a) What are the characteristics of PN junction diode? Point out its specifications. Also point out the significance of dynamic and static resistances. (6)

(b) Draw the circult of Half wave rectifier and its outout waveform. A diode whose intertal resistance is 20 Ω is to supply power to 1000 Ω load from 110 V (RMS) source. Calculate (10)

(i) Peak load current

(ii) DC load current

(iii) AC load current

Reference Answer

(a) Characteristics of PN junction diode:
Forward bias characteristics:
The diode conducts when the p-side is connected to the positive terminal and the n-side to the negative terminal.
A noticeable current flow begins once the forward bias voltage reaches approximately 0.5V to 0.7V (depending on the material, silicon, or germanium).

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