Question

Application to Biology Problem 24.53 Part A What is the proper orientation of the coll? 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 fight. Suppose you are a researcher doing such an experiment in a location where the earth's field is 50 MT at a 60 angle below horizontal. You make a 100 cm diameter, 250- turn 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 netfield 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 collis horizontal and directed south-north. Axis of the coil is horizontal and directed east-west. Axis of the colis 60 below horizontal and directed south-north Axis of the coil is 30" above horizontal and directed south-north. Previous Answers ✓ Correct Part What is the necessary current? Express your answer to two significant figures and include the appropriate units. HA th Value A Submit Previous Answers Best Awe * Incorrect; Try Again; 2) attempts remaining < Return to Assignment Provide Feedback
Please answer part B.

Answer 1

Part B. Led the cal produces magnetic froom fild Boy or oriented south to worth, so, it creata inagnete fied the st Coc B By 7 get tot zouth OA to with If et en oriented to the south, then resultant field B, at disareed a secton. So only possiblety ele, et es et Createn inagrebe seeld Bo to the mouth, so that the resultanut Sead of B. (earth) and Bg e along B From do the above diagram, the angle doctwear B and Baer, o 180 - 600 = 1200 Now. Bit Bu FB Ba +(2 Vor the from dragan, the angle between B and B. en o - 180-60-600 260° Here Bit Bela Sout= soxtet Bon

-- From trangher low of seats addeton wo have, 오 B 2B, B con (5.1? +9012-2(5.)) con By z 50 MT (to the soutle) Befreld produced by the coil at uts center- N. The col have number of turm N=250 Diameter d = 100 cm Radius or= ( ) = 5am 2o-Gm Le it carries I current through it. - The magnetic field at the center due to the col M. NI B2= Gotto 6 Baxan 0 MON Gox loc xato. B SOM - Soxor GTX 10 7 250 T 20.159 A 0.16 A / (In a seguire cat segure) - Then es the required current. B-)
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