In a linear variable differential transformer?

Both inner and outer coil are primary

The inner coil is primary

Both inner and outer coil are secondary

The outer coil is primary

Solution

Correct option is B

In a Linear Variable Differential Transformer (LVDT), the configuration is as follows:
· Primary Coil: The inner coil is the primary coil, which is energized with an AC voltage.
· Secondary Coils: The outer two coils are secondary coils, placed symmetrically on either side of the primary coil.
· A movable core alters the magnetic flux coupling between the primary and secondary coils, generating a differential voltage proportional to displacement.