关于有一道物理电磁场的问题（英文题目）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.

关于有一道物理电磁场的问题（英文题目）
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.