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2 marksTransformers

CSEC Physics · May/June 2008 · Paper 2 · Question 1(h)(i)

State TWO major sources of energy loss in transformers.

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Other parts of this question

  1. 1(a)Use the readings from Table 1 to plot a graph of V₂ vs V₁ on the graph page opposite.[6 marks]
  2. 1(b)Find the slope, S, of your graph.[4 marks]
  3. 1(c)What does the slope of your graph represent?[1 mark]
  4. 1(d)Use your graph to determine the value of V₂ when V₁ = 50 V.[1 mark]
  5. 1(e)Calculate the current I₂ in the secondary windings when V₁ = 50 V.[3 marks]
  6. 1(f)Use the slope of your graph and the equation I₁ = SI₂ to determine the current I₁ in the primary winding.[2 marks]
  7. 1(g)(i)Calculate the power delivered to the resistor, R, by the secondary windings.[3 marks]
  8. 1(g)(ii)Calculate, also, the power input to the primary windings by the source.[1 mark]
  9. 1(h)(ii)Describe the constructional features of commercial transformers which minimize the losses stated in Part (h) (i).[2 marks]

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