IMathAS-libretexts

Students perform an experiment in which they project tiny spheres one by one into the region between two charged plates, as shown in the figure. The spheres have different amounts of electric charge. The students measure the mass, speed, and vertical deflection of the spheres, and use them to determine the charge on the spheres. After many trials, the students produce the table shown.

Which of the following re-expresses the experimental results shown in the table?

The experiment was faulty because some of the entries in the lower row of the table are zero.
It is very difficult to have an object with no electric charge.
There is not enough consistency in the results to say anything conclusive about electric charge.
Electric charge can only be found in multiples of $\displaystyle {1.6}Ã-{10}^{{âˆ’{19}}}$ C.

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