16. Two long conducting cylindrical shells are coaxial and have radii of 20 mm and 80 mm. The electric potential of the inner conductor, with respect to the outer conductor, is +600 V. What is the maximum electric field magnitude between the cylinders? (k = 1/4πεo = 8.99 x 109Nㆍm2/C2)
(A) 22,000 V/m,
(B) 18,000 V/m,
(C) 10,000 V/m,
(D) 14,000 V/m,
(E) 26,000 VIm.
答案：A
統計：A:0,B:0,C:0,D:0,E:0
難度：計算中