1.

A ring having a cross-sectional area of 500 mm2, a circumference of 400 mm and =800microWb has a coil of 200 turns wound around it. Relative permeability of ring is 380. Calculate the reluctance.

A. 1.68 * 10<sup>-4</sup>A/Wb
B. 1.68 * 10<sup>4</sup> A/Wb
C. 1.68 * 10<sup>6</sup> A/Wb
D. 1.68 * 10<sup>-6</sup>A/Wb
Answer» D. 1.68 * 10<sup>-6</sup>A/Wb


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