11. The units ofk= 1/(4πε0)are: (A) N2/C2, (B) N●m/C, (C) N2●m2/C2, (D) N●m2/C2, (E) m2/C2.
11. The units ofk= 1/(4πε0)are: (A) N2/C..-阿摩線上測驗