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Question Number 150783 by jlewis last updated on 15/Aug/21

$$\mathrm{The}\mathrm{current}\mathrm{in}\mathrm{the}\mathrm{windings}\mathrm{on}\mathrm{a}\mathrm{toroid}$$$$\mathrm{is}2\mathrm{A}.\mathrm{There}\mathrm{are}400\mathrm{turns}\mathrm{and}\mathrm{the}\mathrm{mean}$$$$\mathrm{circumferential}\mathrm{length}\mathrm{is}40\mathrm{cm}.\mathrm{With}$$$$\mathrm{the}\mathrm{aid}\mathrm{of}\mathrm{a}\mathrm{search}\mathrm{coil}\mathrm{and}\mathrm{charge}$$$$\mathrm{measuring}\mathrm{instrument},\mathrm{the}\mathrm{magnetic}$$$$\mathrm{field}\mathrm{is}\mathrm{found}\mathrm{to}\mathrm{be}1.0\mathrm{T}.\mathrm{calculate}:$$$$\mathrm{i})\mathrm{magnetic}\mathrm{intensity}\mathrm{ii})\mathrm{magnetization}$$$$\mathrm{iii})\mathrm{the}\mathrm{equivalent}\mathrm{surface}\mathrm{current}$$$$$$$$$$

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