Permeance is the reciprocal of

Flux density
Reluctance
Ampere turns
Resistance

The correct answer is B. Reluctance.

Permeance is the ability of a material to allow magnetic flux to pass through it. It is the reciprocal of reluctance, which is the resistance of a material to the passage of magnetic flux.

The other options are not correct because they are not related to magnetic flux.

  • Flux density is the amount of magnetic flux per unit area.
  • Ampere turns is the product of the number of amperes and the number of turns in a coil.
  • Resistance is the opposition to the flow of electric current.