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2 marksElectricity, Lighting and Safety

CSEC Integrated Science · 2005 · Paper 2 · Question 3(b)

Calculate the total cost of electricity used in December, given a fixed fuel charge of $20.00 and an energy rate of 25 cents per kWh.

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Other parts of this question

  1. 3(a)Read each meter display and calculate the total amount of electricity consumed during December 2002 in kWh.[2 marks]
  2. 3(c)(i)Calculate the total daily energy consumption in kWh per day for all the appliances listed in Table 1.[2 marks]
  3. 3(c)(ii)State two measures the household can implement to reduce their electricity usage.[2 marks]
  4. 3(d)(i)Define what a fuse is.[1 mark]
  5. 3(d)(ii)Explain how a fuse provides protection for an electrical appliance such as a hairdryer.[2 marks]
  6. 3(d)(iii)Explain why water must not be used to extinguish an electrical fire.[2 marks]
  7. 3(d)(iv)State two safe methods used to extinguish an electrical fire.[2 marks]

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