A current density of _________ is used for large power transformers with forced circulation of oil or with water cooling coils

A current density of _________ is used for large power transformers wi

1.	A current density of _________ is used for large power transformers with forced circulation of oil or with water cooling coils
A.	1.5 to 2.5 A/mm¬¨‚â§
B.	3.5 to 4.5 A/mm¬¨‚â§
C.	4.0 to 5.0 A/mm¬¨‚â§
D.	5.4 to 6.2 A/mm¬¨‚â§
Answer» E.