MCQ
An oil drop having charge $2 e$ is kept stationary between two parallel horizontal plates $2.0 \ cm$ apart when a potential difference of $12000$ volts is applied between them. If the density of oil is $900 \mathrm{~kg} / \mathrm{m}^3$, the radius of the drop will be
- A$ 2.0 \times 10^{-6} \mathrm{~m}$
- ✓$ 1.7 \times 10^{-6} \mathrm{~m}$
- C$ 1.4 \times 10^{-6} \mathrm{~m}$
- D$ 1.1 \times 10^{-6} \mathrm{~m}$
