A ring having a cross-sectional area of 500 mm², a circumference of 4 – McqOptions

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1.	A ring having a cross-sectional area of 500 mm², a circumference of 400 mm and ϕ=800microWb has a coil of 200 turns wound around it. Relative permeability of ring is 380. Calculate the magnetising current.
A.	6.7A
B.	7.7A
C.	7.6
D.	6.1A
Answer» B. 7.7A

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