CAPE Physics Unit 2 · 2017 · Paper 1 · Question Q19

Items 19-20 refer to the following op-amp voltage comparator. [Diagram of an op-amp comparator supplied by \pm 9\text{ V}, with inputs V_1 at inverting terminal and V_2 at non-inverting terminal] The supply voltage to the op-amp is \pm 9\text{ V}. If the open loop gain is 10^5, and V_2 = 0, what is the maximum input voltage swing, V_1, for linear amplification?

1. (A)\pm 90\,\mu\text{V}
2. (B)\pm 9\,\mu\text{V}
3. (C)\pm 9\text{ V}
4. (D)\pm 18\text{ V}

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