Question: An iron rod of length L and square cross section (side a), is given a uniform longitudinal magnetization M, and then bent around into a

An iron rod of length L and square cross section (side a), is given a uniform longitudinal magnetization M, and then bent around into a circle with a narrow gap (width w). as shown in Fig. 6.14. Find the magnetic field at the center of the gap, assuming w a M- w

a M- w

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