CAPE Physics Unit 2 · 2017 · Paper 1 · Question Q18

Item 18 refers to the following diagram. [Inverting amplifier circuit with input resistor R_i, feedback resistor R_f, and non-inverting input grounded] The gain of this amplifier is given by

1. (A)\frac{R_i}{R_f}
2. (B)\frac{R_f}{R_i}
3. (C)1 + \frac{R_i}{R_f}
4. (D)1 + \frac{R_f}{R_i}

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