Young domestic chickens have the ability to orient themselves in the earth’s magnetic field. Researchers used a set of two coils to adjust the magnetic field in the chicks’ pen. Figure P24.20 shows the two coils, whose centers coincide, seen edge-on. The axis of coil 1 is parallel to the ground and points to the north; the axis of coil 2 is oriented vertically. Each coil has 43 turns and a radius of 1.0 m. At the location of the experiment, the earth’s field had a magnitude of 5.6 × 10^-5 T and pointed to the north, tilted up from the horizontal by 61°. If the researchers wished to exactly cancel the earth’s field, what currents would they need to apply in coil 1 and in coil 2?

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Coil B Coil 2 The centers 61 of the coils coincide. Up FIGURE P24.20 North