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.

39. Suppose that, in each trial, either electrons or protons had been added to each sphere to produce its charge. In Trial 3, which of the 2 types of particles would have been added to Sphere X, and which of the 2 types of particles would have been added to Sphere Y ?

Answer and Explanation

Your Answer is

Correct Answer is A

Explanation

Look at trail 3 in table 2, QX is -1.0, indicating that sphere X is negatively charged (electron is negatively charged), QY is +1.0, indicating that sphere Y is positively charged (proton is positively charged)