In studies of the possibility of migrating birds using the Earth's magnetic field for navigation, birds have been fitted $ (a) If the identical coils have radii of 1.26 cm and are 2.36 cm apart, with 33 turns of wire apiece, what current should they both carry to produce a magnetic field of 4.10 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 250 2, what voltage should the battery supplying each coll have? V (c) What power is delivered to each coil? mW

In studies of the possibility of migrating birds using the Earth's magnetic field for navigation, birds have been fitted $ (a) If the identical coils have radii of 1.26 cm and are 2.36 cm apart, with 33 turns of wire apiece, what current should they both carry to produce a magnetic field of 4.10 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 250 2, what voltage should the battery supplying each coll have? V (c) What power is delivered to each coil? mW