waecE-LEARNING
Home
Technical
Mathematics
Languages
Science
Social Science
Art
Literature Arabic Islamic Studies C.R.K HistoryMusicVisual Art Clothing/Textile Home Management Shorthand
 
Electronics Paper 2, Nov/Dec. 2010  
Questions: 1 2 3 4 5 6 7 8 9 10 Main
General Comments
Weakness/Remedies
Strength
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).

_____________________________________________________________________________________________________
OBSERVATION

The expected answers were:
(a)(i)


(b)(i)


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.

Powered by Sidmach Technologies(Nigeria) Limited .
Copyright © 2012 The West African Examinations Council. All rights reserved.