Passage VI
A parallel-plale capacitor (PPC) stores electric charge on 2 separated plates when a voltage is applied across the plates. Figure 1 shows a PPC before (left) and after (right) it was filled with a dielectric (insulating material). The capacitance of an empty PPC, C0, is the amount of charge stored per unit of applied voltage. The capacitance of a filled PPC, Cκ, equals C0 multiplied by the dielectric constant, κ, of the filling material. Table 1 gives κ for 12 materials. Table 2 gives the dielectric strength, S (the maximum electric field strength at which a dielectric remains an insulator), for 7 of the materials.
30. Based on Table 2, which of the following graphs best. represents S for H2O, silicone oil, paper, and SrTiO3?
Your Answer is
Correct Answer is J
Explanation
Looking at table 2, the value of SrTiO3 is the smallest, so F and G options are excluded;
Looking at the value of paper in table 2 is greater than the value of silicone oil, So choose J directly