CAPE Physics Unit 2 · 2011 · Paper 1 · Question Q29

Two four-bit binary numbers are fed into the inputs X and Y of an OR gate. The numbers are represented by the pulse trains in the V-t diagrams below. 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.