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