15. 如圖 12 所示之電路(R = 6Ω )，試求 AB 端之等效電阻 Req 為何？Req= _______ 歐姆。

1. (15 points) Three spherical conductors of diameters (直径) \( d{1}, d{2} \), and \( d_{3} \) are separated by distances much greater than the radius of each sphere. The spheres are connected by a conducting wire as shown in Figure 1. Assume each of the three spheres is uniformly charged in electrostatic equilibrium. The total charges of the three spheres are \( Q \) Coulombs. Find the charge density (6 points), the electric potential (3 points), and the magnitude of electric field (6 points) on the surface of each of the spherical conductors.

題組內容

15. 如圖 12 所示之電路(R = 6Ω )，試求 AB 端之等效電阻 Req 為何？R_eq= _______ 歐姆。

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