Bats are capable of navigating using the earth\'s field-a plus for an animal tha

Question

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 a 60 angle below horizontal. You make a 60 diameter, 200-turn coil 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. What is the necessary current?

Explanation / Answer

1: The axis of the coil should be a) horizontal and directed south-north. #2: I=(B*d)/(N*u0) B=the magnetic field in Tesla (not microTesla) d=diameter in meters (not cm) N=number of turns u0=permiability constant=4piE-7 Source(s): Just did it on mastering physics and got it all correct-a-mundo! :D

Related Questions

Navigate

• Browse (All)
• Browse B
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.