Medical devices implanted ins (TET), a type of wi ss charging using a pair of current through a nearby coil outside the body, pro induced emf (in V) if each 11.0-turn coil has a radius of 1.90 cm and the current in the external coil varies from its maximum value of 13.0 A to zero in 6.00 x 10- s. (Hint: Recall from Topic 19 that the magnetic field at the center of the current-carrying external coil is B = NPOL. Assume this magnetic field is constant over the interior coil's area and oriented perpendicular to the internal coil.) HINT Need Help? Read It