The expected answers were:
- The function of the component S is to open or close the circuit in order to control the light bulb.
- Since P = IV
V = =
V = 11.11 V
- 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.
