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2 marksThe p-n Junction Diode

CAPE Physics Unit 2 · 2003 · Paper 2 · Question 1(a)(i)

An experiment investigates the I-V characteristic of a diode used in a control circuit, testing if current I is related to voltage V by I proportional to V^n.

Draw a circuit diagram suitable for examining the I - V characteristic of the diode.

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Other parts of this question

  1. 1(a)(ii)Explain how the readings would be taken.[2 marks]
  2. 1(b)(i)Assuming that I = A V^n, use the graph in Figure 1 to determine the value of n.[4 marks]
  3. 1(b)(ii)Deduce the FULL equation relating the current, I, to the voltage, V, for the diode.[2 marks]

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