The self inductance of a toroid is :\[\frac{\mu_{0}N^{2}r^{2}}{2R_{m}}\]\[\frac{\mu_{0}N^{2}\pi r}{2R_{m}}\]\[\frac{\mu_{0}N^{2}r}{2R_{m}}\]\[\frac{\mu_{0}N^{2}r\pi}{2R_{m}}\]No solution provided for this question.
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