A million electron are added to a pith ball. Its charge is________?
Correct answer: B. - 1.6 x 10^-13 coulomb
- A. - 1.6 x 10^-12 coulomb
- B. - 1.6 x 10^-13 coulomb
- C. - 1.6 × 10 -18 coulomb
- D. - 1.6 × 10 coulomb
Explanation
Each added electron has charge -1.6 x 10^-19 coulomb. For 1,000,000 electrons, total charge = 1,000,000 x (-1.6 x 10^-19 coulomb) = -1.6 x 10^-13 coulomb. The likely choice is a, because it results from using the charge of one electron or shifting the power of ten incorrectly.
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