CAPE Physics Unit 2 · 2017 · Paper 1 · Question Q20

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] If the input voltages, V_1 and V_2, are given as 2\,\mu\text{V} and 6\,\mu\text{V} respectively, and the open loop gain is A_0, what is the value of V_0?

1. (A)2 A_0\,\mu\text{V}
2. (B)4 A_0\,\mu\text{V}
3. (C)6 A_0\,\mu\text{V}
4. (D)8 A_0\,\mu\text{V}

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