waecE-LEARNING
Electronics Paper 2, Nov/Dec. 2011  
Questions: 1 2 3 4 5 6 7 8 9 10 Main
General Comments
Weakness/Remedies
Strength



















































Question 2

State the condition for resonance of a series RLC circuit.

Figure 5 is a series RLC resonance circuit.

  1. Calculate the
  2. resonant frequency;
  3. capacitive reactance;
  4. inductive reactance.

 

_____________________________________________________________________________________________________
OBSERVATION

The expected answers were:
(a)    XL = XC

Electronic Image
(b)    (i)                 fo =
              =
              =
              = 356 kHz or 0.356 MHz
         (ii)                XC =
              XC = 89.41 Ω
         (iii)               XL = 2
              XL = 89.47 Ω
             

The question was on Circuit Analysis. The question was very popular with the candidates. The performance was above average.

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