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CAPE Physics Unit 2 · 2015 · Paper 2 · Question 5(d)

The signals S and R shown in Figure 9 are simultaneously applied to the corresponding inputs of an S-R flip-flop. Determine and draw on Figure 9, the Q-output (indicates that the flip-flop is set) of the flip-flop for time intervals 1–5.

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Other parts of this question

  1. 5(a)Draw the truth table for a 2-input NAND gate.[2 marks]
  2. 5(b)Complete Table 5 for the circuit shown in Figure 8 and hence show that this circuit is equivalent to a NAND gate.[4 marks]
  3. 5(c)Draw the NAND gate version of an S-R flip-flop taking care to label all inputs and outputs.[4 marks]

More practice: the rest of this paper · more Logic Gates questions · all CAPE Physics Unit 2 past papers