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1 markThe p-n Junction Diode

CAPE Physics Unit 2 · 2004 · Paper 2 · Question 2(b)(i)

Producing an approximately 4 V DC output from an AC supply whose output is shown in Figure 2b, using a step-down transformer, capacitor, diode, CRO, and load resistor.

Complete the design of the circuit on the diagram to achieve this objective using all given components.

This question uses a figure or table from the paper — you'll see it when you practise.

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Other parts of this question

  1. 2(a)(i)Plot a graph of input voltage, V_i, against output voltage, V_o, on the grid provided on page 7.[4 marks]
  2. 2(a)(ii)Use the graph to determine the turns ratio of the transformer.[2 marks]
  3. 2(a)(iii)Calculate the number of turns in the primary windings if the number of turns in the secondary windings is 30 000.[1 mark]
  4. 2(b)(ii)Sketch on Figure 2b the output voltage that would be seen on the oscilloscope.[2 marks]

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