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複選題16. Consider a p-n diode. Which of the following statements are correct? (A) Electrons on the n side and holes on the p side will flow towards each other and recombine until all the carriers are neutralized. (B) When the diode is forward biased, both electron current and hole current will flow in the diode contributing to the overall current. (C) When the diode is reverse biased, the current in the diode is essentially negligible if there is any. (D) A good quality diode can be easily formed by mechanically compressing p- and n- type semiconductors into close contact. (E) All of the above.

複選題15. Consider energy bands in a crystal. Which of the following statements are correct? (A) The conduction band of a metal is partially filled by electrons. (B) Existence of energy gap is a manifestation of quantum mechanical phenomenon. (C) Intrinsic semiconductors cannot conduct electricity at all even at high temperatures. (D) Doped semiconductors can conduct electricity primarily with the carriers in the conduction band or holes in the valence band. (E) All of the above. 注

複選題14. You want to calculate electron waves 4(x) in a thin wire (1-dimensional). What if the potential outside the wire were infinite? Which of the following statements are correct in this scenario? (A) The allowed kinetic energies of electrons should be quantized. (B) (x) 0 everywhere000 eV (C) (x) ≈0 everywhere, except for 0＜x＜L. 이 L (D)y(x) = 0 everywhere, except for 0＜x＜L (E) Can't tell anything yet. Need to find y(x) first. mathematically V(x) = ∞ for x＜0 and x＞L V(x) = 0 eV for 0＞x＜L

(B) Consider the Bohr Hydrogen atom model, assume that condition for orbit stability is h nλ = 2π r where 1 = .Show that the Bohr Hydrogen atom model's Energy levels is mv me1 E=-8ɛh² n²

Problem 18: (A) Consider the Rutherford Hydrogen atom model as following figure, show that the total energy of e² hydrogen atom is E =40318質子 +e F e F電子

(C) Derive the time-independent (space) part of one dimensional Schrodinger's equation.

2025/09/17 pmtest

講師：IDeath

簡介：test

民法

講師：winnie

簡介：課程內容幫考生收集法條重點,可快速分辨出法條考點及整理相關考試內容

【高普考】會計法規概要/會計審計法規

講師：0000

簡介：以PPT之形式呈現課程。

國文

描述：題庫筆記

（國考）Spine棘圖高度

描述：螢光筆為國考考過的重點

（國考）Scoliosis risser grade

描述：未成年對於側彎惡化的追蹤方法

37. For the system described by the figure below, which statement is CORRECT? (A) The forward reaction is endothermic (B) Ea for the forward reaction is greater than for the reverse reaction (C) The effect of a temperature change is greater for the reverse reaction than for the forward reaction (D) A and B are more stable than C and D

15.根據價殼層電子對互斥理論(Valence Shell Electron Pair Repulsion，VSEPR)，XeF₂的分子形狀為何？ (A)直線形 (B)彎曲形 (C) T 形 (D)四面體形

17.在一個電化學電池中，鋅(Zn)為陽極，銅(Cu)為陰極，鋅離子濃度為 0.1M，銅離子濃度為 1.0M，電池的電動勢大約是多少伏特？ (A) 7.57 (B) 5.13 (C) 4.65 (D) 1.13

6.有關急性胰臟炎的敘述，下列何者正確？ (A)因膽道疾病導致膽汁與胰液逆流而引起 (B)穆菲氏徵象（Murphy’s sign）是常見表徵 (C)康復期應採高脂飲食 (D)血清中鈣濃度通常會升高

7.有關口服膽囊攝影檢查（oral cholecystography）的敘述，下列何者正確？ (A)檢查前需採低脂飲食 (B)急性膽囊炎為適應症之一 (C)檢查前30分鐘服下含碘顯影劑 (D)檢查後若排尿有燒灼感代表出現泌尿道感染

8.有關口腔癌的敘述，下列何者正確？ (A)發生部位以上顎黏膜最多 (B)以鱗狀上皮細胞癌最常見 (C)咀嚼不順為常見早期徵象 (D)口腔有無痛且不易癒合的潰瘍為常見晚期徵象