Question

The principle of operation of LVDT is based on the operation of:

• A. self-inductance
• B. mutual inductance
• C. reluctance
• D. permeance

Hint:

LVDTs are precise displacement sensors that operate based on the principle of mutual inductance, where the movement of a core changes the inductive coupling between coils, resulting in a differential output.

Answer 1

The Correct Option is B

The Linear Variable Differential Transformer (LVDT) works on the principle of mutual inductance, which refers to the interaction between two coils of wire where the induced voltage in one coil depends on the variation of magnetic flux caused by the movement of a ferromagnetic core.
- Self-inductance refers to the voltage induced in a coil due to a change in its own magnetic field, but LVDT operates on mutual inductance between the primary and secondary coils.
- Reluctance and permeance are concepts related to magnetic circuits but are not directly involved in the operation of an LVDT.
Therefore, the correct answer is mutual inductance.