CAPE Physics Unit 2 · 2019 · Paper 1 · Question Q19

Item 19 refers to the following op-amp voltage comparator. 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.