試題詳解

50. A parallel-plate capacitor has a capacitance of 100 pF, a plate area of 100 cm², and the space between the plates is completely filled with a mica dielectric (k =5.4). At a potential difference of 50 V, which of the following values is closest to the magnitude of the electric field E in the mica?
(A) 1.0 × 10⁴ V/m
(B) 1.0 × 10³ V/m
(C)1.0 × 10² V/m
(D) 1.0 × 10¹ V/m
(E) 1.0 V/m