(a)[2]
State what the gain of an op-amp means.
(b)[2]
State two ways in which negative feedback affects the gain of an amplifier circuit that uses an op-amp.
(c(i))[1]
State the name of the circuit type shown in Fig. 7.1.
(c(ii))[1]
On Fig. 7.1, mark a point in the circuit with the letter X that represents a virtual earth.
(c(iii))[2]
Calculate the gain of the circuit shown in Fig. 7.1.
(c(iv))[1]
Determine the value of $V_{\text{IN}}$ when $V_{\text{OUT}}$ equals $+6.5\,\text{V}$.
(c(v))[1]
Determine the value of $V_{\text{OUT}}$ when $V_{\text{IN}}$ equals $-5.4\,\text{V}$.