Question

How should the permeability and number of ampere turns for good magnetic materials be?

(a) high permeability, high ampere turns

(b) high permeability, low ampere turns

(c) low permeability, low ampere turns

(d) low permeability, high ampere turns

The question was posed to me in an online interview.

The above asked question is from Magnetic Materials in chapter Electrical Engineering Materials of Design of Electrical Machines

Answer 1

Correct option is (b) high permeability, low ampere turns

For explanation I would say: High permeability is always required in magnetic materials for its good operation. At the same time high permeability leads to less ampere turns in the materials.