Question

What is the range of the current density in the field conductors?

(a) 3 to 5 A per mm^2

(b) 3 to 4 A per mm^2

(c) 4 to 5 A per mm^2

(d) 3 to 6 A per mm^2

I had been asked this question during an interview.

This interesting question is from Design of Field Winding in section Design of Synchronous Machines of Design of Electrical Machines

Answer 1

Correct answer is (b) 3 to 4 A per mm^2

For explanation I would say: The minimum range of the current density in the field conductors is 3 A per mm^2. The maximum value of the current density in the field conductors is 4 A per mm^2.