CAPE Physics Unit 2 · 2018 · Paper 1 · Question Q30

Two four-bit binary numbers are fed in series into the inputs, A and B, of an OR gate. The numbers are represented by the pulse trains in the following V\text{-}t diagrams. Which of the following pulse trains represents the output pulse from the OR gate?

1. (A)[diagram option — open in Quelpr]
2. (B)[diagram option — open in Quelpr]
3. (C)[diagram option — open in Quelpr]
4. (D)[diagram option — open in Quelpr]

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