Chapter 30195P30.20The separation between the wires isa=°=2 6 008 001 67.sin..cmcmaf.(a)Because the wires repel, the currents are inopposite directions .(b)Because the magnetic force acts horizontally,FFIamgBg==°µπ022800Atan .Imga202Atan .so I=67 8. A.FIG. P30.20Section 30.3Ampère’s LawP30.21Each wire is distant from Pby0 20045 00 141.cos..m maf°=.Each wire produces a field at Pof equal magnitude:BIaA×⋅=−072200 105000141707....TmAAmTejaf.Carrying currents into the page, Aproduces at Pa field of. Tto the left and down at –135°, while Bcreates a fieldto the right and down at – 45°. Carrying currents towardyou, Cproduces a field downward and to the right at – 45°,while D’s contribution is downward and to the left. The
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