問題詳情

4.Assume that a long solenoid of radius R with n turns of thin wires per unit length is carrying a steady current /,and its axis of symmetry is along the z-direction.
(a)Justify that the magnetic field (whenever nonzero) is in the z-direction.

參考答案

答案:A
難度:非常簡單0.959596
統計:A(285),B(0),C(9),D(1),E(0)

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