Quiz 1. Basic Sensors and Electrical Principles

Question 1

Give examples of physical sensors

Answer 1

-Strain gauge/Load cell
– Pressure sensor
– Thermistor
– Metal resistance
thermometer (RTD)
– Accelerometer
– Velocimeter
– Flow sensor
– Radiation

Question 2

Give examples of bioanalytical sensors

Answer 2

-Glucose sensor

– Lactate sensor

Question 3

chemical

Answer 3

– Oxygen electrode
– Glass electrode (pH)
– Ion-selective electrode
– CO2 sensor

Question 4

tranducer

Answer 4

a device that converts energy from one form to another

Question 5

actuator

Answer 5

a device that converts an electric signal to physical output

Question 6

sensor

Answer 6

a device that converts a physical parameter to electric output

Question 7

what does conductance = in terms of resistance

Answer 7

1/R

Question 8

potentiometric

Answer 8

These involve the measurement of the emf
of a cell at zero current. The emf is proportional to the log of
the concentration of the substance being determined

Question 9

Amperometric :

Answer 9

: An increasing/decreasing potential is applied
to the cell until oxidation/reduction of the substance to be
analyzed occurs and there is a sharp rise/fall in the current to
give a peak current. The peak current  concentration of the
electroactive material.

Question 10

Conductometric.

Answer 10

Most reactions involve a change in the
composition of the solution. This will normally result in a
change in the electrical conductivity of the solution, which can
be measured electrically.