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 Electronics Paper 1, May/June 2009
 Questions: 1 2 Main
Weakness/Remedies
Strength

Question 2

(a) Connect the circuit as shown in Figure 2

(b) Ask the supervisor to check the circuit connection.

 R(Ω) 10 k Ω 1 k Ω 100 Ω V2(V)

(d) Switch on the supply voltage.

(e) Measure and record the value of V2 in Table 2.

(f) Switch off the supply voltage and replace the 10 kΩresistor.
with the 1 resistor

(g) Repeat steps (d) and (e)

(h)Switch off the supply voltage and replace the 1 k Ω resistor with the 100 Ω resistor

(i) Repeat steps (d) and (e)

(j)Switch off the supply voltage

(k)Briefly describe the effect of the values of the resistance on the output voltage (V2) of the circuit.

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OBSERVATION

This experiment was attempted by nearly all candidates.

The candidates’ performance was unsatisfactory.

The candidates were able to connect the required circuit, and completed Table 2.  Candidates’ brief description of the effect of the values of the resistance on the output voltage (V2) of the circuit was not cogent.