Relate ‘Reluctance with the following:

• A. Weber/m
• B. A/m
• C. A-T/Weber
• D. Weber/A

Answer: (C)

The reluctance of any part of a magnetic circuit may be defined as the ratio of the drop in magnetomotive force to the flux produced in that part of the circuit. It is measured in ampere-turns/Weber and is denoted by S.
Reluctance = m.m.f ⁄ flux