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3 marksElectricity, Lighting and Safety

CSEC Integrated Science · May/June 2013 · Paper 2 · Question 6(c)(iii)

Mr James uses an extension cord to power a 60 W light bulb in a shed at 120 V.

When a blow dryer and clothes iron are plugged into the same socket causing an overload, identify the device in the house that prevents wiring from burning and describe how it works.

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Other parts of this question

  1. 6(a)Name the THREE primary colours of light in the rainbow.[3 marks]
  2. 6(b)Describe how Anna could create secondary colours with spotlights on a white wall.[3 marks]
  3. 6(c)(i)Calculate the current in the extension cord when the 60 W bulb is turned on at 120 V.[4 marks]
  4. 6(c)(ii)A washing machine rated at 360 W, 120 V, and 3 A is plugged into the same extension cord. Explain the safety of this action by identifying TWO possible hazards…[2 marks]

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