In a large laboratory electromagnet, the poles have a circular cross section with a diameter of (100

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In a large laboratory electromagnet, the poles have a circular cross section with a diameter of \(100 \mathrm{~mm}\) and are \(25 \mathrm{~mm}\) apart. If there is a uniform 1. 3-T magnetic field between the poles, how much magnetic potential energy is stored in the magnetic field?

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