Quelpr
2 marksElectricity, Lighting and Safety

CSEC Integrated Science · May/June 2010 · Paper 2 · Question 5(b)(iii)

Explain which is more cost effective: using the fan for twelve hours instead of six hours OR using the toaster oven for two hours.

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Other parts of this question

  1. 5(a)(i)What is the function of an electricity meter?[1 mark]
  2. 5(a)(ii)What is the reading on the meter shown in Figure 7?[1 mark]
  3. 5(a)(iii)The reading of the meter on 01 June 2008 was 22 943 kWh. Calculate the amount of electricity used during the month of June.[1 mark]
  4. 5(a)(iv)Calculate the cost of electricity for the month of June if the cost is 70 cents for every kWh of energy used.[2 marks]
  5. 5(b)(i)Complete Table 2 to show the missing values at (a) and (b).[2 marks]
  6. 5(b)(ii)State THREE measures which the family can implement to reduce energy consumption.[3 marks]
  7. 5(c)Distinguish between a 'switch' and a 'fuse'.[1 mark]
  8. 5(d)State the energy changes that take place when an electric toaster oven is used in homes powered by solar energy.[2 marks]

More practice: the rest of this paper · more Electricity, Lighting and Safety questions · all CSEC Integrated Science past papers