两半径为a和b的同心导体球面间电位差为V0,问b固定,要使半径为a的球面上场强最小,a与b的比值?A.1/3 B.1/e C.1/2 D.1/4

两半径为a和b的同心导体球面间电位差为V0,问b固定,要使半径为a的球面上场强最小,a与b的比值?A.1/3 B.1/e C.1/2 D.1/4
两半径为a和b的同心导体球面间电位差为V0,问b固定,要使半径为a的球面上场强最小,a与b的比值?
A.1/3 B.1/e C.1/2 D.1/4

两半径为a和b的同心导体球面间电位差为V0,问b固定,要使半径为a的球面上场强最小,a与b的比值?A.1/3 B.1/e C.1/2 D.1/4
B