Question

Strain gage is an example of which device?

(a) Transducer

(b) Voltage follower

(c) Integrator

(d) Differentiator

I had been asked this question in an online quiz.

Enquiry is from Instrumentation Amplifier in portion Operational Amplifier Applications of Linear Integrated Circuits

Answer 1

The correct answer is:

(a) Transducer

Explanation:

A strain gauge is a type of transducer that converts a mechanical strain (deformation) into a corresponding change in electrical resistance. This change in resistance can be measured and converted into an electrical signal, typically by using a Wheatstone bridge and an instrumentation amplifier.

• How it works: When the strain gauge experiences mechanical deformation (compression or tension), its resistance changes proportionally. This resistance change is then used to determine the applied force or load.
• Application: Strain gauges are commonly used in weight scales, pressure sensors, and load cells.

The other options are not correct because:

• Voltage follower, integrator, and differentiator are specific types of operational amplifier circuits, not physical devices like a strain gauge.