Electronics Paper 2, Nov/Dec. 2010  
Questions: 1 2 3 4 5 6 7 8 9 10 Main
General Comments
Question 8

(a) Draw a full-wave centre tapped rectifier circuit to produce a negative output voltage across a load resistor.
(b) Sketch the
(i) input waveform for each diode in (8)(a);
(ii) output waveform across the load resistor in (8)(a).


The expected answers were:


The question was on Power Supply. It was unpopular with the candidates. As reported by the Chief Examiner, none of the candidates appeared to understand the centre-tap connection. The performance was very poor.

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