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1、- 1 -2013 - 2014 学年第 二 学期期末考试卷（A 卷）课程名称： College Physics 课程类别： 必修 考试方式： 闭卷 注 意 ： 1、 本 试 卷 满 分 100 分 。 2、 考 试 时 间 120 分 钟 。题号 I II III IV 得分得分评阅人I. There are 6 statements in this part. Please mark a “” in the bracket if it is right, or a “” if it is wrong. （2612 points）题号 1 2 3 4 5 6 得分答案1 If an obje
2、ct is moving without any kind of force, it will continue to move along in a perfectly straight line at a constant speed. ( )2. The work of the gravity is not related with the motion path of the particle, and only depends on the initial and final positions of the particle. ( )3 Electric flux is a vec
3、tor.( )4 The line of magnetic field is closed. ( )5 The optical wave is a longitudinal wave (纵波). ( ) 6 At a given temperature, lighter molecules move faster, on average, than heavier ones ( )II. Choose one correct answer among following choices（4624 points）题号 1 2 3 4 5 6 得分答案学院： 专业班级： 姓名： 学号： 装 订 线
4、 内 不 要 答 题 - 2 -1 When a mass point is in a circular motion, then ( ) (A) The tangential acceleration definitely change, the normal acceleration also change.(B) The tangential acceleration may not change, the normal acceleration definitely change. (C) The tangential acceleration may not change, the
5、normal acceleration does not change. (D) The tangential acceleration definitely change, the normal acceleration does not change.2 An object move along a smooth inclined plane from rest, as shown in figure, which statement is correct ( )(A) Both of the time and the speed of the object at the endis in
6、dependent on the inclined angular.(B) Only the speed of the object at the end is independenton the inclined angular.(C) Only the time of the object passing through the inclined plane is independent on the inclined angular.(D) Both of the time and the speed of the object at the end is depended on the
7、 inclined angular.3 In following statements which one is the correct ( )(A) The electric potential is definitely zero at the point where the electric field is zero. (B) The electric potential is non-zero at the point where the electric field is not zero. (C) The electric field intensity is definitel
8、y zero at the point where the electric potential is zero.(D) The electric field intensity is definitely zero in the space where the electric potential is constant.4 The segment of wire in figure carries a current of I, where the radius of the circular arc is R, the magnitude of the magnetic field at
9、 O is ( ) (A) (B) RI80RI40(C) (D) 25 The light with the wavelength 550nm irradiates on the single slit with the width 1800nm, the highest order spectrum that can be observed is ( )(A) 1 (B) 2 (C) 3 (D) 4- 3 -6 The same kind of ideal gas are in three containers A, B and C, their molecular number dens
10、ity are also the same whereas the ratio of the mean square speed is 1:2:4,what is the ratio of the pressure ( )(A) 1:2:4 (B) 1:4:8 (C) 1:4:16 (D) 4:2:1III. Filling the following blanks（4624 points ）题号 1 2 3 4 5 6 得分答案1. The motion equations of a particle is and in SI, then the 2301tx2015tymagnitude
11、of the initial velocity is 。2. A semi-sphere surface of radius R is charged uniformly, the surface density of electric charge is , so the electric potential at the sphere center is 。03. If 500 J of heat added to ideal gas that is expanding from 0.2 m3 to 0.3 m3 at a constant pressure of 4000 Pa, the
12、 change in its internal energy is 。4. Two objects m1=4.00 kg and m2=7.00 kg are connected by a light string that passes over a frictionless pulley. The sliding friction between m1 and the surface is neglected. The acceleration of the two objects is .5. When applying the wedge interference to examine
13、 the roughness of the optical device, we find that the interference fringes are shown as the right figure, then the upper surface of the device is (concave 凹的，convex，凸的)。m1m2- 4 -6 In general, point of zero potential is taken at an infinite distance from the charge. With this choice, a potential due
14、 to point changes Q can be expressed as 。IV. Calculation（41040 points）题号 1 2 3 4 合计得分1. There is a small boat on the lake. Some people on the bank draw the boat to the bank with the string carrying the fixed pulley. Suppose people draw the string with invariable speed v0, the height of the pulley fr
15、om the water surface is h, and the length of the string from the boat to the pulley is L, determine the speed of the boat.2. An insulating sphere of radius R has a uniform charge distribution and a total positive charge Q. Calculate the electric field intensity at a point outside or inside the sphere.- 5 -3. In the experiment of double-slit interference, the distance between two slits is 0.30mm, and the monochromatic light (单色光) irradiates two slits vertically. On the screen that is 1.20m away from slits, the distance between two fifth dark fringes locating by o
