HW4: The toroid of Figure below has a coil of 1000 turns wound on its core....

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HW4: The toroid of Figure below has a coil of 1000 turns wound on its core. If p = 10 cm and a = 1 cm, what current is required to establish a magnetic flux of 0.5 mWb (a) If the core is nonmagnetic (b) If the core has u,= 500 HW4: The toroid of Figure below has a coil of 1000 turns wound on its core. If p = 10 cm and a = 1 cm, what current is required to establish a magnetic flux of 0.5 mWb (a) If the core is nonmagnetic (b) If the core has u,= 500