Which one of the following is not the function of pole shoes in a dc machine? (1) To reduce eddy current loss (2)To support the field coils (3)To spread out flux for better uniformity (4)To reduce the...

Which one of the following is not the function of pole shoes in a dc machine?

(1) To reduce eddy current loss

(2)To support the field coils

(3)To spread out flux for better uniformity

(4)To reduce the reluctance of the magnetic path

(5)None of the above.