問題詳情
12. Which is not correct for the dielectric constant ( x ) of a substance?
(A) It is a measureof the response of its charges to an external electric field；
(B) The capacitance of acapacitor can be enhan ced by a factor of n when filling with this substance；
(C) k = 0for an ideal conductor；
(D) All；
(E) None.
參考答案