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3 marksTransformers

CSEC Physics · 1989 · Paper 2 · Question 1(a)

A transformer has 1 200 primary turns and 300 secondary turns. A resistive load on the secondary is varied, and secondary current Is vs primary current Ip is plotted.

Draw a circuit diagram for the experiment. Label the primary and secondary windings.

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Other parts of this question

  1. 1(b)(i)Find, from the graph, the value of Ip when Is = 1.00 A.[1 mark]
  2. 1(b)(ii)Determine the slope of the line and hence write an equation relating Is and Ip.[4 marks]
  3. 1(b)(iii)State and explain what you would have expected the equation to be if the transformer had been an ideal one.[3 marks]
  4. 1(b)(iv)What would have been the value of Ip for the ideal transformer when Is = 1.00 A?[1 mark]
  5. 1(c)(i)Describe the first of TWO measures you would take in the construction of a transformer to make its behaviour close to that of an ideal one.[2 marks]
  6. 1(c)(ii)Describe the second of TWO measures you would take in the construction of a transformer to make its behaviour close to that of an ideal one.[2 marks]

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