A coaxial cable with an inner diameter of 1 mm and outer diameter of 2.4 mm is filled with a dielectric of relative permittivity 10.89. Given
μ0 = 4π x 10-7H/m, ε0 = 10-9/36π F/m, the characteristic impedance of the cable is
(A) 330Ω
(B) 100Ω
(C) 143.3Ω
(D) 15.19Ω
