A steel bar needs 1200 AT to magnetise it. The voltage that must be ap – McqOptions

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1.	A steel bar needs 1200 AT to magnetise it. The voltage that must be applied to the magnetising coil of 100 turns and 10 &ohm; resistance is __________ volt.
A.	120
B.	12
C.	1200
D.	10
Answer» B. 12

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