In an actual transformer the iron loss remains practically constant from no load to full load because ___________

Primary voltage remains constant

Value of transformation ratio remains constant

Permeability of transformer core remains constant

Core flux remains practically constant

In an actual transformer the iron loss remains practically constant fr

1.	In an actual transformer the iron loss remains practically constant from no load to full load because ___________
A.	Value of transformation ratio remains constant
B.	Permeability of transformer core remains constant
C.	Core flux remains practically constant
D.	Primary voltage remains constant
Answer» D. Primary voltage remains constant