20. A particle detector has a resolution 15% of the width of a one-dimensional infinite square well. What is the probability that the detector will find a particle in the ground state of the square well if the detector is centered on the midpoint of the well?
(A) 0.13
(B) 0.21
(C) 0.29
(D) 0.35

(E) 0.42

1. A 1.5-m-long pipe has one end open and the other end closed. Among its possible standing-wave frequencies is 225 Hz; the next higher frequency is 375 Hz. The sound speed in the pipe is(A) 600 m/s(B) 450 m/s(C) 350 m/s(D) 300 m/s(E) 150 m/s

2. Consider a simple model for earth's atmosphere by neglecting winds, convection and variation in gravity etc. The distribution of molecules is varying with height. Assume that the atmosphere is isothermal (at 273 K) and the average molecular weight of the atmosphere is 30 g/mol, the height below which half the molecules ie approximately is(A) 3.5 km(B) 4.2 km(C) 5.4 km(D) 6.7 km(E) 8.1 km

3. The volume charge density inside a solid sphere of radius a is ρ = ρ₀r²/a, where ρ₀ is a constant. The electric field strength within the sphere, as a function of distance r from the center is(A) ρ₀r³/5ε₀a(B) ρ₀r²/4ε₀a(C) ρ₀r/3ε₀a(D) ρ₀/2ε₀a(E) ρ₀/ε₀a

4. Eight identical spherical raindrops are each at a potential V. They coalesce to make one spherical raindrop whose potential is:(A) V/8(B) V/2(C) 2V(D) 4V(E) 8V

5. A parallel plate capacitor, with air dielectric, is charged by a battery after which the battery is disconnected. A slab of glass dielectric is then slowly inserted between the plates. As it is being inserted,(A) a force repels the glass out of the capacitor.(B) the glass makes the plates repel each other.(C) no force acts on the glass.(D) a net charge appears on the glass.(E) a force attracts the glass into the capacitor.

6. An uncharged 2.0-μF capacitor is connected in series with a 50-kΩ resistor, an ideal 10.0-V battery, and an open switch. What is the voltage across the capacitor 100ms after closing the switch?(A) 2.0V(B) 3.7V(C) 5.0V(D) 6.3V(E) 10.0V

7. A 1500-m-wide dam holds back a lake 95 m deep. The torque that the water exerts about the bottom edge of the dam is(A) 2.1×10¹² N·m(B) 1.3×10¹¹ N·m(C) 2.1×10¹⁰ N·m(D) 1.3×10¹⁰ N·m(E) 2.1×10⁹ N·m

8. A solid cylinder of mass M and radius R is mounted on a axle through its center. The axle is attached to a horizontal spring of constant k, and the cylinder rolls back and forth without slipping. The angular frequency of the motion is (A) (B)(C)(D)(E)

9. The mass of a deuteron is about 2 u, compared with a neutron's 1u. The fraction of a neutron's kinetic energy that's transferred to an initially stationary deuteron in a head-on collision is(A) 11%(B) 25%(C) 50%(D) 75%(E) 89%

10. A gas mixture contains monatomic argon and diatomic oxygen. Suppose the temperature range is such that the numbers of degrees of freedom are 3 for the monatomic argon and 5 for the diatomic oxygen. An adiabatic expansion that doubles its volume results in the pressure dropping to one-third of its original value. What fraction of the molecules are argon?(A) 45%(B) 62%(C) 79%(D) 85%(E) 93%

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 - [無官方正解]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

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

114年 - [無官方正解]114 台灣聯合大學系統_學士班轉學生考試試題：普通物理#128198

114年 - 114 國立臺灣大學_碩士班招生考試：普通物理學#125985