What is not a temperature sensor principal? A. Strain gauge B. Thermocouple sens

Question

What is not a temperature sensor principal? A. Strain gauge B. Thermocouple sensors C. Thermistors D. Radiation thermometry 3. What are the major difference for the passive RC filter and the active op-amp filter?__ A. Passive RC filter needs external power supply B. Active op-amp filter needs external power supply C. Passive RC filter can filter signal as well as amplify signal D. Active op-amp filter can only filter the signal Which of the following is incorrect? __ A. Electrodes arc actually transducers that convert between ionic current in the body to electronic current in the wire B. Electrode creates the interface between the body and the electronic measuring apparatus C. During measure, there is no current flowing in the circuit D. When measuring biopotential, a close circuit is formed with wire part and body part 5. Which statement below is not true? __ A. There arc two types of electrodes: polarizable and nonpolarizable electrodes B. Perfectly polarizable electrode has actual charges crossing the electrode-electrolyte interface when current is applied. It behaves as though it were a capacitor C. Perfectly nonpolarizable electrode has charges freely passing across the electrode-electrolyte interface. D. In reality, no perfectly polarizable or nonpolarizable electrodes can be fabricated. They can only approach to these characteristics.

Explanation / Answer

2. Option (A) Strain Gauge.

Strain Gauge is used to measure strain from the change in resistance due to the applied strain, while the rest other are used in temperature measurement.

3) Option (B)

A passive filter consists of only passive elements - R,L,C, and a active filter op-amp filter has passive elemets as well as a external source.

4) C

5) B

Perfectly polarizable electrodes have no actual charges crossing the electrode-electrolyte interface when current is applied. It behave as a capacitor.

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