Passage VII

Identical spheres, X and Y, had electrical charges Qx and QY, respectively. Throughout each of 13 trials, the spheres remained fastened to the horizontal floor of a vessel a distance d apart, with X due east of Y (see Figure 1).

The vessel was filled with a medium having a dielectric constant, K. (K reflects a medium's ability to modify the electrical force between charges.) X exerted an electrical force of magnitude FY on Y, and Y exerted an electrical force of magnitude Fx on X. Each force was directed either east or west.

Table 1 lists K for 4 media. Table 2 lists Qx, QY, d, the medium, Fx, and FY for each trial.

36. Based on Table 1 and the results of Trial 1 and Trials 11-13, as K increased, Fx:

Answer and Explanation

Your Answer is

Correct Answer is G

Explanation

Look at table 1, from air to NP, K is increasing; look at table 2, compare trails 1-10 (air) and trails 11-13 (PE, TO, and NP), and find that FX is basically decreasing . So the bigger the K, the smaller the FX