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Gaokao Physics Practice Question

在雷雨云下沿坚直方向的电场强度为 $10^{4} \mathrm{~V} / \mathrm{m}$, 已知一半径为 $1 \mathrm{~mm}$ 的 雨滴在此电场中不会下落, 取重力加速度大小为 $10 \mathrm{~m} / \mathrm{s}^{2}$, 水的密度为 $10^{3} \mathrm{~kg} / \mathrm{m}^{3}$. 这雨滴携带的电荷量的最小值约为

  1. A.$2 \times 10^{-9} \mathrm{C}$
  2. B.$4 \times 10^{-9} \mathrm{C}$
  3. C.$6 \times 10^{-9} \mathrm{C}$
  4. D.$8 \times 10^{-9} \mathrm{C}$

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