In transformers using hot rolled steel, the cross-section of the yoke is made about _____ greater than that of the core

In transformers using hot rolled steel, the cross-section of the yoke

1.	In transformers using hot rolled steel, the cross-section of the yoke is made about _____ greater than that of the core
A.	5 percent
B.	10 percent
C.	15 percent
D.	30 percent
E.	none of the above
Answer» D. 30 percent

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In transformers using hot rolled steel, the cross-section of the yoke is made about _____ greater than that of the core

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