If one million electrons are added to a pith ball, what is its charge?
Correct answer C. -1.6 × 10⁻¹³ C
Explanation
Each electron carries -1.6 × 10⁻¹⁹ C, so one million electrons give 10⁶ × (-1.6 × 10⁻¹⁹) = -1.6 × 10⁻¹³ C.
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