Two long electrical distribution lines run parallel to the ground and are separated horizontally by a distance d = 4.5 m. They each carry a current of i = 550 A, with the easternmost line running due north and the westernmost line running due south. Earth’s magnetic field in this area has a magnitude of B = 40 µT, and it points due north and at an angle of θ = 7.5° below the horizontal (i.e., towards the ground). What is the magnitude of the net magnetic force on each meter-long sec- tion of the eastern line?

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Chapter1: Units, Trigonometry. And Vectors
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Two long electrical distribution lines run parallel to the ground and are separated horizontally by a distance d = 4.5 m. They each carry a current of i = 550 A, with the easternmost line running due north and the westernmost line running due south. Earth’s magnetic field in this area has a magnitude of B = 40 µT, and it points due north and at an angle of θ = 7.5° below the horizontal (i.e., towards the ground). What is the magnitude of the net magnetic force on each meter-long sec- tion of the eastern line?
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