CAPE Physics Unit 2 · 2008 (Rest of Region) · Paper 1 · Question Q25

The signal below shows the input to two T-type bistables in series which are triggered by a downward pulse. The correct sequence for outputs X and Y is

1. (A)Sequence starting 0 0, 1 0, 1 1, 0 1
2. (B)Sequence starting 0 0, 1 0, 0 1, 1 1
3. (C)Sequence starting 0 0, 0 1, 1 1, 1 0
4. (D)Sequence starting 0 0, 0 1, 1 0, 1 1

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