Q1
Some passive sensors are relatively simple and are based around the principles of
i) resistance, ii) capacitance or iii) inductance.
a) Describe the general mechanisms behind sensors based around two of the three
principles (i, ii and iii) above. Your answer should include equations and diagrams
to help illustrate your description.
[10]
b) Describe simple methods to measure i) resistance and ii) capacitance that could be
employed to monitor sensors.
[6]
c) How would you modify these methods in a situation where you did not know if the
sensor behaved as an inductor or capacitor? You should explain how this
modification works.
[4]
