CAPE Physics Unit 2 · 2008 (Rest of Region) · Paper 1 · Question Q7

An oil drop of mass 2 \times 10^{-14}\text{ kg} carries a charge Q. If the drop is stationary between two parallel plates 20\text{ mm} apart with a potential difference of 500\text{ V} between them, then the value of Q is

1. (A)8 \times 10^{-19}\text{ C}
2. (B)8 \times 10^{-18}\text{ C}
3. (C)8 \times 10^{-16}\text{ C}
4. (D)4 \times 10^{-15}\text{ C}