What is the relation between axial dimension and the area of the magnet?
(a) area of the magnet is directly proportional to the axial dimension
(b) area of the magnet is indirectly proportional to the axial dimension
(c) area of the magnet is directly proportional to the square of the axial dimension
(d) area of the magnet is indirectly proportional to the square of the axial dimension
The question was asked in an internship interview.
Question is taken from Design Steps and Considerations in portion Design of Permanent Magnet (PM) DC Motors of Design of Electrical Machines