Question

In studies of the possibility of migrating birds using the Earth's magnetic field for navigation, birds have been fitted with coils as "caps" and "collars" as shown in the figure below. (a) If the identical coils have radii of 1.28 cm and are 2.10 cm apart, with 75 turns of wire apiece, what current should they both carry to produce a magnetic field of 4.80 x 10-5 T halfway between them? x Your response differs from the correct answer by more than 10%. Double check your calculations. mA (b) If the resistance of each coil is 230 12, what voltage should the battery supplying each coil have? x Your response differs from the correct answer by more than 10%. Double check your calculations. V (c) What power is delivered to each coil? X Your response differs from the correct answer by more than 10%. Double check your calculations. mW

Answer 1

Pago pa Data: / / A B (@) omdi 7000 P Ng l na 75 raddii of coil re 1.28. cm distance Between 1: 2, 10 cm. म we take point f at the anis which makes e angle from A 4 Oz angle from B then magnetic field at ? Mo n I [ los oa - Case when p is the mid point BE Og = 180-2 B = lo nI Cos (18o-e) - 60 go 2 Ba Mon I २. [-2cos e

0 0.80 lla ² & lpg? 1.5 1.3 ginen B = 400 x 105T tlo XI 1280ido] 4,8x105 d direction I= Yoda 105 x2 2x 0.8 x llon n=75 Mo Yax 107 I 4.8 x 10 5*9 2x0,8 x 4x107x 75 I 2. A I ñ 2x103 mA

(6) Resistence of coil = 2304 Voltage =&= eR. V=2x230 va 460 Volt each coil have 460 Volt, delivered = ixu power P 2x 460 = 920 watt P = 9.2x105 mW plz upvote. زه