The current in the windings on a toroid is 2.0 A. There are 400 turns and the mean circumferential length is 40 cm. If the inside magnetic field be 1.0 T , the relative permeability of the core of torroid is approximately

The current in the windings on a toroid is 2.0 A. There are 400 turns

1.	The current in the windings on a toroid is 2.0 A. There are 400 turns and the mean circumferential length is 40 cm. If the inside magnetic field be 1.0 T , the relative permeability of the core of torroid is approximately
Answer» 100 200 300 400 Solution :Relative PERMEABILITY `mu_r = (B)/(B_0) = (B)/(mu_0 N I) = (1.0)/((4 pi xx 10^(-7)) xx ((400)/(0.4 m)) xx 2.0) = 400 ` (approx)

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The current in the windings on a toroid is 2.0 A. There are 400 turns and the mean circumferential length is 40 cm. If the inside magnetic field be 1.0 T , the relative permeability of the core of torroid is approximately

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