A sample of a ferromagnetic iron in the shape of a cube of side 1.0 ~m contains 8.7 10²⁸ atoms per cubic metre and the magnetic dipole moment of each iron atom is 9.3 10⁻²⁴ ~A ~m ^2 . Then the maximum possible magnetic dipole moment (in A m

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A sample of a ferromagnetic iron in the shape of a cube of side 1.0 ~m contains 8.7 10²⁸ atoms per cubic metre and the magnetic dipole moment of each iron atom is 9.3 10⁻²⁴ ~A ~m ^2 . Then the maximum possible magnetic dipole moment (in A m ^2 ) of the sample is nearly

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Correct answer: C. 81 10⁻¹⁴

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A sample of a ferromagnetic iron in the shape of a cube of side 1.0 ~m contains 8.7 10²⁸ atoms per cubic metre and the magnetic dipole moment of each iron atom is 9.3 10⁻²⁴ ~A ~m ^2 . Then the maximum possible magnetic dipole moment (in A m ^2 ) of the sample is nearly

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