Question

The linear variable differential transformer (LVDT) is an accurate and reliable transducer for measurement of

• A. Voltage
• B. Displacement
• C. Current
• D. Temperature

Hint:

The key word is "Linear" in LVDT. This directly points to the measurement of straight-line physical motion, which is displacement.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
An LVDT (Linear Variable Differential Transformer) is an electromagnetic passive transducer that converts a mechanical linear motion into an electrical signal.

Step 3: Detailed Explanation:
The LVDT consists of a single primary winding and two symmetrically placed secondary windings wrapped around a hollow tube.
A ferromagnetic core moves inside this tube, connected directly to the object whose position is being monitored.
As the core moves, the mutual inductance between the primary and each secondary winding changes.
This variation generates an output voltage proportional to the physical linear displacement of the core.
Thus, the primary measurement variable of an LVDT is physical linear displacement.

Step 4: Final Answer:
The correct option is 2, which corresponds to Displacement.