If ' $n$ ' electrons are placed on each of the two small spheres with their centres spaced $3 \mathrm{~cm}$…

If ' $n$ ' electrons are placed on each of the two small spheres with their centres spaced $3 \mathrm{~cm}$ apart so that they repel each other by a force of $10^{-19} \mathrm{~N}$ then ' $\mathrm{n}$ ' will be $\left[\frac{1}{4 \pi \varepsilon_0}=9 \times 10^9 \mathrm{Nm}^2 \mathrm{C}^{-2}\right]$
  1. $125$
  2. $225$
  3. $625$
  4. $1250$

Solution

No solution. Refer to answer key.

Asked in: AP EAMCET 2017 (25 Apr Shift 1)

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