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ガウスの法則に関する問題２
A proton with speed v = 300000 m/s orbits just outside a charged sphere of radius r = 0.01m. What is the charge on the sphere? 答えは-1.04nです。 とき方を教えてください。
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まったくわかりません。とき方と答えを教えてください。 Two spherical cavities, of radii a and b, are hollowed out form the interior of a (neutral )conducting sphere of radius R. At the center of each cavity a point charge is placed - call these charge qa and qb. (a) Find the surface charges of three spheres. (b) What is the field outside the conductor? (c) What is the field within each cavity? (d) What is the force on qa and qb? (e) Which of these answers would change if a third charge, qc, were brought near the conductor?
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解き方と、できれば答えも教えてください。 A long coaxial cable carries a uniform volume charge density on the innner cylinder (radius a), and uniform surface charge density on the outer cylindedrical shell (radius b) . This surface charge is negaive and of just the right magnitude so that the the cable as whole is electical neutral. Find the electric field in ecah of the three regions: (1) inside the innner cylinder (s<a) (2) betweeen cylinders (a<s<b). (3) outside the cable (s>b).)
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charge of uniform volume density (1.2nC/m3) fills an infinitie slab between x = -0.05 m and x = 0.05 m. What is the magnituide of the electric filed at any point with the cordinate x = 0.04m and x = 0.06m? アメリカの大学の物理の授業のテキストのガウスの法則の章にある基本問題のひとつです。この問題をとくのにどのような形のgaussian surfaceを使ったらいいのかわかりません。x = 0.04m and x = 0.06mのときの答えはそれぞれ5.4N/Cと6.8N/Cです。答えの導き方を教えてください。来週テストがあるのであせっています。
- ベストアンサー
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A metal sphere of radius R, carrying charge q, is surrounded by a thick concentric metal shell (innner radius a, outer raidius b) the shell carries no net charge. (a) find surface charge density at R and at b (b) find potential at the center, using infinity as the reference point. (c) Now the outer surface is touched to a ground wire, which lowers its potential to zero (same as infinity).
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- 以下の英文についてお尋ねします。hammer
A man is in court for murder and the judge says, “You are charged with beating your wife to death with a hammer.” Then a voice at the back of the court says, “You bastard!” The judge continues, "You are also charged with beating your daughter to death with a hammer.” Again the voice at the back of the court says, “You bastard!” The judge says, “Now, we cannot have any more of these outbursts from you or I shall charge you with contempt, now what is the problem?” “Now, we cannot have any more of these outbursts from you or I shall charge you with contempt, now what is the problem?” のhave any more of those~の用法を解説して頂ければ幸いです。
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The radius of the sphere should not affect the solution except that the companion solution in the integral kernel would vary with the radius. Also, it should be noted that the companion solution is a function of source point y. integral kernel という積分核っていったいなんなんでしょうか？ お手数かもしれませんが，よろしくお願いします．
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この数学の解き方を忘れたので分かりやすく教えて欲しいです。 1. A turtle moves 3.5m (E) in 136 s and then moves 1.7m (W) in 88s. (a) What is the average speed of the turtle? (b) What is the average velocity of the turtle? 2. A motorcycle is being designed to be the fastest in the world. The target speed on a trial ride was 540 km/h. How far would the motorcycle travel in 15s? 2の答えの単位もよくわかんないです。 お願いします。
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お礼
okormazd様。わかりやすい解答ありがとうございます。 この問題では、ご解答のように遠心力とprotonに加わるelectric forceが等しいことに着目して、そこから導き出されるＥlectirc fieldをガウスの法則に代入すればよいのですね。 助かりました～。