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試卷名稱：109年 - 109 高雄醫學大學_學士後醫學系招生考試：物理#87237
年份：109年
科目：學士後西醫-物理
15. There is a doughnut-shaped toroidal solenoid with 200 turns of wires carrying current 0.02A. The inner radius of that is 1 m and outer radius is 5 m. What is the magnetic field B of this doughnut-shaped toroidal solenoid at the point with distance 0.5 m from center of that? ( μ0 is permeability constant )
(A) 0
(B) 4 μ0/π
(C) 2 μ0/π
(D) μ0/2π
(E) μ0/4π
