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 reluctance.
A.	1.68 * 10¯⁴A/Wb
B.	1.68 * 10⁴ A/Wb
C.	1.68 * 10⁶ A/Wb
D.	1.68 * 10¯⁶A/Wb
Answer» D. 1.68 * 10¯⁶A/Wb

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