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3 marksPower, P

CSEC Physics · May/June 2006 · Paper 2 · Question 2(c)(iii)

When the lamp is lit, 4 W of the energy supplied is lost as heat. Calculate the efficiency of the lamp.

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Other parts of this question

  1. 2(a)Explain what is meant by 'electrical resistance'.[2 marks]
  2. 2(b)(i)Identify the type of connection employed in this circuit.[1 mark]
  3. 2(b)(ii)Give the meaning of the circuit symbols labelled: B, C.[2 marks]
  4. 2(b)(iii)Name the type of voltage produced at A.[1 mark]
  5. 2(c)(i)A fluorescent lamp is rated at 15W, 120V. Calculate the current which the lamp draws from the main supply.[3 marks]
  6. 2(c)(ii)Calculate the resistance of this lamp while it is lit.[3 marks]

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