To practice Problem-Solving Strategy 28.2 Ampere's Law. A solid cylindrical conductor is supported by insulating disks on the axis of a conducting tube with outer radius Ra = 7.75 cm and inner radius Rb = 5.05 cm. (Figure 1) The central conductor and the conducting tube carry equal currents of I = 3.45 A in opposite directions. The currents are distributed uniformly over the cross-sections of each conductor. What is the value of the magnetic field at a distance r = 5.79 cm from the axis of the conducting tube? What is the value of the magnetic field at a distance r = 5.79 cm from the axis of the conducting tube? Recall that μ0=4π×10−7 T⋅m/A. Express your answer numerically in teslas.
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