(a)[2]
State two consequences of negative feedback on the gain of an amplifier that uses an operational amplifier (op-amp).
(b)[4]
An incomplete circuit diagram for an ideal operational amplifier is given in Fig. 8.1. The amplifier’s voltage gain is $+5.0$. (i) Complete the circuit diagram of Fig. 8.1. (ii) Calculate the resistance of any extra resistor you have drawn on Fig. 8.1.
(b(i))[2]
Finish the circuit diagram in Fig. 8.1.
(b(ii))[2]
Determine the resistance of whichever extra resistor you have added to Fig. 8.1.
(b(iii))[2]
Fig. 8.2 gives the time variation of the input potential $V_{\text{IN}}$. On Fig. 8.2, draw the time variation of the output potential $V_{\text{OUT}}$.