Strain Gauge as a Resistive Transducer:
Strain gauge is a type of resistive transducer that is commonly used to measure the strain or deformation in an object. Here is why strain gauge is classified as a resistive transducer:

Working Principle:
- A strain gauge works on the principle of change in resistance due to strain.
- When a strain is applied to an object, it deforms slightly, causing a change in its electrical resistance.
- This change in resistance is proportional to the strain experienced by the object.

Resistance Change:
- Strain gauges are typically made of a flexible metallic foil or wire.
- As the object deforms, the resistance of the strain gauge changes accordingly.
- This change in resistance can be measured using a Wheatstone bridge circuit to accurately determine the strain in the object.

Output Measurement:
- The change in resistance of the strain gauge can be converted into an electrical signal that can be easily measured and recorded.
- This electrical signal can then be used to calculate the strain, stress, or force applied to the object.

Applications:
- Strain gauges are widely used in industries such as aerospace, automotive, and civil engineering for structural health monitoring, stress analysis, and load testing.
- They are also used in research and development for material testing and deformation analysis.
In conclusion, strain gauges are considered resistive transducers because they operate based on the change in electrical resistance due to strain, making them an essential tool for measuring and monitoring mechanical deformations in various applications.