※ [本文轉錄自 NTU-Exam 看板] 作者: yaujack (大頭) 看板: NTU-Exam 標題: [試題] 94下 普通物理-蘇得潤 時間: Thu Apr 20 16:08:40 2006 課程名稱︰ 普通物理甲下 課程性質︰ 課程教師︰ 蘇得潤 開課系所︰ 機械系 考試時間︰ 4/20 試題 : 1. (a) If there is a charge -Q is put on the top of an inclined plane with inclined angle θ, what will be the balance position x of a charged block with mass m and charge q from the top? (10%) (b-1) If the block is started from 2/x < x_1 < x from the top, what will be acceleration of the block slided along the plane if the plane is frictionless?　(5%) (b-2) what is the velocity when the block is passing through the point x? (10%) 2. Figure 23-17(不會畫, 見Halliday Fundamental Physics, SampleProblem 23-6) shows portions of two large, parallel. nonconducting sheets. each with a fixed uniform charge on one side. The magnitudes of the surface charge densities are σ(+) = 6.8μC/m^2 for the positively charged sheet and σ(-) = 4.3μC/m^2 for the negatively charged sheet. Find the electric field E (a) to the left of the sheets. (b) between the sheets. and(c) to the right of the sheets. (25%) 3. A slab of copper of thickness b = 2.00mm is thrust into a parallel-plate capacitor of plate area A = 2.40cm^2 and plate separation d = 5.00mm, as shown in Fig. 25-65(見Halliday, Fundamental Physics, p681. 82題); the slab is exactly halfway between the plates. (a) What is the capacitance after the slab is introduced? (b) If a charge q = 3.40μC is maintained on the plates, what is the ratio the stroed energy before to that after the slab is inserted? (c) How much work is done on the slab as it is inserted? (d) Is the slab sucked in or must it be pushed in? 4. In Fig. 27-34.(見Halliday, Fundamental Physics, p727. 19題) R_1=100Ω. R_2 = 50Ω. and the ideal batteries have emfs ε_1 = 6.0V, ε_2 = 5.0V, and ε_3 = 4.0V. Find (a) the current in resistor 1, (b) the current in resistor 2, and (c) the potential difference between points a and b. --

※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.112.240.55 ※ 編輯: yaujack 來自: 140.112.240.55 (04/20 16:09) ※ 編輯: yaujack 來自: 220.135.39.228 (04/20 20:47) --

※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 59.112.195.124