Applied Electricity Paper 2 , May/June 2011
 Questions: 1 2 3 4 5 6 Main
Weakness/Remedies
Strength

Question 6

.

1.      In Figure 6, state the function of the component S.
2.      Determine the voltmeter reading when the component S is closed.
3.      Calculate the energy consumed by component L in 1 hour.

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Observation

1.      The function of the component S is to open or close the circuit in order to      control the light bulb.
2.      Since P = IV

V =  =
V = 11.11 V

1.      Energy consumed by the component L = kW x h

20 x 1 = 20 Wh OR 0.020 x 1
=0.020 kWh
The question was on Direct Current Circuit Theory/Electrical Wiring. The question was popular with the candidates. The performance was reported good.
The candidates who attempted this were able to identify the component S and stated its function. Many of them calculated correctly the voltage drop across the lamp-load and the energy consumed by it.