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試卷名稱：110年 - 110 國立中山大學碩士暨碩士專班招生考試_物理系碩士班:普通物理#105961
年份：110年
科目：研究所、轉學考(插大)◆普通物理學
17. Capacitor and dielectric slab. Consider (see Figure 3.) a capacitor with a fixed charge Q but without a dielectric slab (vacuum permittivity is ε0). Its energy is denoted as U0 . A dielectric slab of dielectric constant K(i.e, permittivity becomesKε0) is now inserted into the plates. Find the work W required to insert the dielectric between the plates.
(A)
(B) W=U0(K+1)
(C) 
(D)