(a(i))[2]
State what is meant by negative feedback.
(a(ii))[2]
State two effects of negative feedback on the gain of an amplifier.
(b(i))[2]
An ideal op-amp is included in the amplifier circuit shown in Fig. 8.1. Calculate the gain $G$ for the amplifier circuit.
(b(ii))[2]
Determine the output potential difference $V_{\text{OUT}}$ when the input potential differences $V_{\text{IN}}$ are (1) $-0.10\text{ V}$ and (2) $+1.3\text{ V}$.
(b(iii))[1]
The gain of the amplifier shown in Fig. 8.1 is constant. State one modification that can be made to the circuit of Fig. 8.1 so that the amplifier circuit monitors light intensity levels, with the magnitude of the gain decreasing as light intensity increases.