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1 markLogic Gates

CAPE Physics Unit 2 · 2002 · Paper 1 · Question 6(b)(ii)

A circuit monitors two doors: Logic 0 is closed, Logic 1 is open. An output of Logic 1 is required when only one or the other door is open.

Draw the single logic gate which produces the output specified in (b)(i).

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Other parts of this question

  1. 6(a)State what is understood by a 'logic gate'.[1 mark]
  2. 6(b)(i)Write down the truth table for the circuit.[2 marks]
  3. 6(b)(iii)Give the name of the logic gate drawn in part (b)(ii).[1 mark]
  4. 6(c)(i)Calculate the y-plate sensitivity of the c.r.o.[4 marks]
  5. 6(c)(ii)Explain how the waveform shown in Figure 9 could be 'smoothed'.[1 mark]

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