Q.69
Match the following transducers with their operational function:
Choose the correct answer from the options given below :
|
List - I
Transducer
|
List - II
Function
|
||
|---|---|---|---|
| A | Strain Gauge Strain Gauge | I | Converts mechanical deformation into an electrical signal Converts mechanical deformation into an electrical signal |
| B | Thermocouple Thermocouple | II | Measures temperature by the voltage difference between two dissimilar conductors Measures temperature by the voltage difference between two dissimilar conductors |
| C | LVDT LVDT | III | Utilized for measuring linear displacement with high accuracy Utilized for measuring linear displacement with high accuracy |
| D | Piezoelectric Transducer Piezoelectric Transducer | IV | Generates an electrical charge when subjected to mechanical pressure or vibration Generates an electrical charge when subjected to mechanical pressure or vibration |
- Match Instrumentation Transducers with Working Principles:
- Strain Gauge $\longrightarrow$ (I) Mechanical deformation to electrical signal: Piezoresistive sensor whose electrical resistance alters proportionally to mechanical strain ($R \propto \Delta L$).
- Thermocouple $\longrightarrow$ (II) Temperature measurement via Seebeck effect: Generates an electromotive force (EMF) at the junction of two dissimilar metallic conductors proportional to temperature difference.
- LVDT (Linear Variable Differential Transformer) $\longrightarrow$ (III) Precision linear displacement: Inductive transducer converting core linear mechanical position into differential secondary AC voltage with extreme linearity.
- Piezoelectric Transducer $\longrightarrow$ (IV) Electrical charge under mechanical pressure/vibration: Asymmetric crystal (quartz, PZT) generating electric surface charge in response to applied dynamic stress.
- Conclusion: A-I, B-II, C-III, D-IV (Option 2).
Correct option: (2) AA,B-I,C-I,D-V.
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