13. An electron moving at constant speed v in a circular orbit with radius r around the nucleus. What is the ratio of its magnetic dipole moment to its orbital angular momentum?
(A) e/m
(B) e/2m
(C) -e/m
(D) -e/2m

13. An electron moving at constant speed v in a circular orbit with radius r around the nucleus. What is the ratio of its magnetic dipole moment to its orbital angular momentum? (A) e/m (B) e/2m (C) -e/m (D) -e/2m.

14. Suppose we use a Hall probe to measure the magnitude of a constant magnetic field. The Hall probe is a strip of copper with a height of 1 mm. We measure a voltage of 0.15 μV across the probe when we run a current 2 A through it. What is the magnitude of the magnetic field? (The density of copper is 8.96 g/cm3, and 1 mole of copper is 63.5 g and each copper atom has one conduction electron) (A) 0.5 T (B) 0.8T (C) 1.02 T (D) 2.1 T

15. A uniform electric field of 200 V/m is directed at 30° below the x axis, as shown in fig. 1. Find the changes in potential: Vb - Va. The coordinates are b = (2 cm, 3 cm) and a = (-2 cm, 0 cm). (A) -3.9 V (B) 3.9 V (C) -9.9 V (D) 9.9 V

16. Three parallel infinite sheets with charged densities are 2σ, -2σ and σ C/m² respectively and separate 2d and d, as shown in fig. 2. These sheets divide the space into four parts, I, II, III, and IV. Which two regions have the same electric field. (A) I and II (B) II and III (C) II and IV (D) I and III

17. A flat, circular coil of radius 4 cm carries a current of 1.3 A and produces a magnetic field of 4.9 Gauss at its center. How many turns does it have? (A) 12 (B) 24 (C) 36 (D) 48

18. The current in a long solenoid varies according to I(t) = 4+ 6t² A. The solenoid has 800 turns/m and a radius of 2 cm. At t = 2 s find the magnitude of the induced electric filed at 4 cm from the central axis. (A) 1.21x10⁻⁴ V/m (B) 1.21 x10⁻⁴ J/(A*m) (C) 2.42x10⁻⁴ V/m (D) 2.42x10⁻⁴ J/(C*m)

19. A coil is composed of circular loops of radius r = 5.13 cm and has N = 47 windings. A current, i = 1.27 A, flows through the coil, which is inside a homogeneous magnetic field of magnitude 0.911 T. What is the maximum torque on the coil due to the magnetic field? (A) 0.148Nt.m (B) 0.211 Nt.m (C) 0.350 Nt.m (D) 0.450 Nt.m

20. Calculate the potential difference induced between the tips of the wings with a wingspan of 64.67 m at a speed of 913 km/h. Assume the magnitude of the downward component of the earth's magnetic field is B = 5.0*10⁻⁵ T. (A) 0.82 V (B) 1.64 V (C) 2.95 V (D) 10.4 V

21. Which experiment indicates the particle-like wave? (A) Compton scattering (B) Rutherford scattering (C) Bragg reflection (D) Stern-Gerlach experiment

22. Ultraviolet light of wavelength 350 nm is incident on a material with a stopping potential of 0.25 V. The work function of the material is (A) 1.3 eV (B) 2.3 eV (C) 3.3 V (D) 5.2 V

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 - [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 - 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

114年 - 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Ｂ#129362

114年 - 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Ｃ#129360

114年 - [無官方正解]114 國立臺灣大學_轉學生招生考試試題：普通物理學(A)#128199