(Solution) - A toroid has a square cross section of side a -(2025 Original AI-Free Solution)

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Academic Level: Undergrad. (yrs 3-4)

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A toroid has a square cross section of side a. The toroid has N turns and radius R. The toroid is narrow (a << R) so that the magnetic field inside the toroid can be considered to be uniform in magnitude. What is the self-inductance of the toroid?