A tiny water droplet with mass $3.0\,\mu\text{g}$ has a charge of $-6.0 \times 10^{-11}\,\text{C}$. It is placed in the Earth’s gravitational field between two horizontal metal plates. The upper plate is at a potential of $+500\,\text{V}$, while the lower plate is at a potential of $-500\,\text{V}$. The plates are $2.0\,\text{mm}$ apart. What is the droplet’s motion?
- AIt accelerates downwards.
- BIt remains stationary.
- CIt accelerates upwards.
- DIt moves upwards at a constant velocity.