What currents are needed to generate the magnetic field strengths of Table 29.1 at a point 1.0

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What currents are needed to generate the magnetic field strengths of Table 29.1 at a point 1.0 cm from a long, straight wire?

Table 29.1

Field source......................Field strength (T)
Surface of the earth ..........5 × 10-5
Refrigerator magnet .........5 × 10-3
Laboratory magnet ............0.1 to 1
Superconducting magnet .......10

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