17. Magnetic fields are produced by
(A) constant electric currents
(B) electric currents that vary sinusoidally with time
(C) time-varying electric fields
(D) all of the above
(E) only ( A ) and ( B ) above

18. Boat 1 goes directly across a stream a distance L and back taking a time t₁. Boat 2 goes down stream a distance L and back taking a time t₂. If both boats had the same speed relative to the water, which of the following statements is true? (A) t₂ ＞ t₁ (B) t₂ ＜ t₁ (C) t₁ = t₂ (D) t₂ = 2t₁ (E) t₂ = 0.5 t₁

19. Microscopes are inherently limited by the wavelength of the light used. How much smaller (in order of magnitude) can we "see" using an electron microscope whose electrons have been accelerated through a potential difference of 50 000 V than using red light (500 nm)? (A) 2 (B) 8 (C) 5 (D) 10 (E) 16

20. The wave function ψ(x) of a particle confined to 0 ≤ x ≤ L is given by ψ(x) = Ax. ψ(x) = 0 for x ＜ 0 and x ＞ L. When the wave function is normalized, the probability density at coordinate x has the value (A) (2/L²) x (B) (2/L²) x² (C) (2/L³) x² (D) (3/L³) x² (E) (3/L³) x³

1. Which of these dienes is the most reactive in the Diels-Alder reaction? (A) 1,3-Butadiene (B) 1,4-Pentadiene (C) 2,3-Dimethyl-1,3-butadiene (D) 1,2-Butadiene (E) 1,4-Cyclohexadiene

2. Which of the following is      not      true concerning the strength of a nucleophile? (A) Nucleophilicity may not parallel basicity. (B) Negatively charged nucleophiles are always more reactive than their conjugate acids. (C) The greater the strength of a nucleophile, the faster an Sₙ2 reaction will occur. (D) Strong bases are always good nucleophiles (E) None of these answer choices are correct.

3. Why is sodium methoxide      not      used in the Claisen condensation of ethyl acetate? (A) The methoxide is a weaker base than the ethoxide which is used. (B) sodium methoxide is more difficult to prepare than sodium ethoxide. (C) The methoxide would abstract a proton from the ethyl group of the ester. (D) Use of sodium methoxide would result in transesterification. (E) sodium methoxide can be used as well as sodium ethoxide.

4. Which of these is      not      a reversible process? (A) Base-promoted ester hydrolysis (B) Acid-catalyzed ester hydrolysis (C) Aldol addition (D) Claisen condensation (E) Acetal formation

5. A compound has the molecular formula, C₆H₁₂O₂. Its IR spectrum shows a strong absorption band near 1740 cm⁻¹; its ¹H NMR spectrum consists of two singlets, at δ 1.2 and 3.6 ppm. The most likely structure for this compound is: (A) Isopropyl propionate (B) Propyl propionate (C) Ethyl isobutyrate (D) tert-Butyl acetate (E) Methyl pivalate

6. Which of the following terms correctly describes these compounds listed below? (A) conformational isomers (B) not isomers (C) stereoisomers (D) constitutional isomers (E) enantiomers

7. Which of the following predictions of δ value and splitting pattern of the labeled protons in ¹H NMR (CDCl₃) is true? (A) Hₐ (2.5 ppm, triplet) (B) Hb (3.1 ppm, triplet of triplet) (C) Hc (3.1 ppm, triplet of triplet) (D) Hd (2.2 ppm, triplet of doublet) (E) He (2.0 ppm, singlet)

115年 - 115 台灣聯合大學系統_學士班轉學考試_A3／A6：普通物理#142629

115年 - [無官方正解]115 國立臺灣大學_轉學生招生考試試題：普通物理學(A)#142625

115年 - 115 台灣聯合大學系統_碩士班招生考試_物理類：普通物理#139676

115年 - [無官方正解]115 國立中山大學_碩士班考試入學招生考試試題_物理系：普通物理#138395

115年 - [無官方正解]115 國立臺灣大學_碩士班招生考試：普通物理學#137725

114年 - 114 國立嘉義大學_轉學生招生考試試題：普通物理#143735

114年 - [無官方正解]114 國立成功大學_碩士班招生考試_物理學系：普通物理學#138760

114年 - [無官方正解]114 國立中山大學_碩士班招生考試試題_物理系：普通物理#137736

114年 - 114 台灣聯合大學系統_碩士班招生考試：普通物理#137733

114年 - [非官方正解]114 臺灣綜合大學系統_學士班轉學生聯合招生考試試題：普通物理Ａ#129365