(a(i))[1]
State one suitable sensing device in each case for detecting a temperature change.
(a(ii))[1]
State one suitable sensing device in each case for detecting pressure changes in a sound wave.
(b(i))[3]
The ideal operational amplifier (op-amp) shown in Fig. 10.2 is to be used as a processing unit. State the value of the output potential $V_{\text{OUT}}$ when the input potential is $V_{\text{IN}} = +0.5\,\text{V}$. Justify your answer.
(b(ii))[3]
A sensing device produces a varying potential $V_{\text{IN}}$. The change of $V_{\text{IN}}$ with time $t$ is shown in Fig. 10.3. On the axes of Fig. 10.3, sketch the change with time $t$ of the output potential $V_{\text{OUT}}$.