(a(i))[2]
State the meaning of negative feedback.
(a(ii))[2]
State two consequences of negative feedback on the gain of an amplifier.
(b)
The circuit in Fig. 7.1 includes an ideal operational amplifier (op-amp).
(b(i))[1]
Calculate the gain $G$ of the amplifier circuit.
(b(ii).1)[1]
Determine the output potential difference $V_{\text{OUT}}$ when the input potential difference $V_{\text{IN}}$ is $+0.60\,\text{V}$.
(b(ii).2)[1]
Determine the output potential difference $V_{\text{OUT}}$ when the input potential difference $V_{\text{IN}}$ is $-2.1\,\text{V}$.
(b(iii))[1]
The gain of the amplifier shown in Fig. 7.1 is constant. State one change that could be made to the circuit of Fig. 7.1 so that the amplifier monitors temperature with the gain falling as the temperature rises.