Question

A linear variable differential transformer (LVDT) is:

• A. an impedance matching transformer
• B. a displacement transducer
• C. a differential temperature sensor
• D. an auto transformer

Hint:

LVDTs are precise and highly reliable sensors for measuring linear motion — think "displacement" whenever you hear LVDT.

Answer 1

The Correct Option is B

An LVDT (Linear Variable Differential Transformer) is an electromechanical transducer that converts linear displacement into an electrical signal.
It consists of a primary coil and two secondary coils wound on a cylindrical former, with a movable soft iron core inside.
When the core moves, the induced voltage in the secondary coils changes proportionally, allowing precise measurement of displacement.
It is not used for impedance matching, temperature sensing, or auto-transforming.