siminghao的翻譯是準(zhǔn)確的
你把無限長的電線放到了勻強(qiáng)電場里,假設(shè)這條電線是豎著放的.很明顯你任取一條平行于電線的線,這條線上的電勢都是一樣的,所以電勢和高度沒關(guān)系.所以可以斷定題目中給的柱坐標(biāo)的圓柱軸線是平行于電線的.
導(dǎo)體放電場里,導(dǎo)體表面等勢,導(dǎo)體表面場線垂直表面.
把這個(gè)東西換成直角坐標(biāo)系.x=rcosθ,y=rsinθ,v=Ax+Bx/(x^2+y^2).導(dǎo)線不帶電,所以電勢是0,方程0=Ax+Bx/(x^2+y^2),正好是個(gè)圓心在原點(diǎn)的圓x^2+y^2=-B/A,所以a^2=-B/A.當(dāng)r->無窮,dv/dr的最大值就是場強(qiáng),所以E=A.相應(yīng)B=-E*a*a.
關(guān)于有一道物理電磁場的問題（英文題目）
關(guān)于有一道物理電磁場的問題（英文題目）
An uncharged conducting cylinder of infinite length and radius a is placed in a previously uniform electric field E in vacuo with its axis at right angles to the eletric vector.show that v=Arcosx+(B/r)cosx is a possible distribution of the electrosatic potential in appropriate cylinderical co-ordinates for r>a,and obtain the values of the constants A and B.
An uncharged conducting cylinder of infinite length and radius a is placed in a previously uniform electric field E in vacuo with its axis at right angles to the eletric vector.show that v=Arcosx+(B/r)cosx is a possible distribution of the electrosatic potential in appropriate cylinderical co-ordinates for r>a,and obtain the values of the constants A and B.
數(shù)學(xué)人氣：157 ℃時(shí)間：2020-05-20 05:09:58
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