Question

Part A What is the proper orientation of the coil? Bats are capable of navigating using the earth's field-a plus for an animal that may fly great distances from its roost at night. If, while sleeping during the day, bats are exposed to a field of a similar magnitude but different direction than the earth's field, they are more likely to lose their way during their next lengthy night flight Suppose you are a researcher doing such an experiment in a location where the earth's field is 50 AT at a 60° angle below horizontal. You make a 60 cm diameter, 250-lum coll around a roosting box; the sleeping bats are at the center of the coil. You wish to pass a current through the coil to produce a field that, when combined with the earth's field, creates a net field with the same strength and dip angle (60 below horizontal) as the earth's field but with a horizontal component that points south rather than north Axis of the coil is horizontal and directed south-north. Axis of the coil is horizontal and directed east-west. Axis of the coil is 60 below horizontal and directed south-north. Axis of the coil is 30° above horizontal and directed south-north. Subm Previous Answers 1 Correct Part B What is the necessary current? Express your answer to two significant figures and include the appropriate units μΑ ? 1. Value Units Submit Previous Answers Request Answer

Answer 1

b)The current is, Bd I= Νμ, (50x10- (1 m) (250)(41 x10-7) = 0.159154943A =0.16A