Which of the following statements with respect to reluctance are true?
(i) Reluctance is directly proportional to the length of magnetic circuit.
(ii) Reluctance is directly proportional to the area of cross-section.
(iii) Reluctance is inversely proportional to the absolute permeability of magnetic circuit.
1
(i), (ii) and (iii)
2
(i) and (iii)
3
(ii) and (iii)
4
(i) and (ii)