(a)[1]
State the name of the component marked X in Fig. 10.1.
(b(i))[2]
On Fig. 10.1, add the symbols for two resistors to finish the sensing-device circuit.
(b(ii))[2]
On Fig. 10.1, add the relay symbol to complete the processing-unit circuit.
(c(i))[1]
State the purpose of the relay.
(c(ii))[2]
Suggest why the diode is connected to the output of the operational amplifier (op-amp) in the direction shown.