CAPE Physics Unit 2 · 2019 · Paper 1 · Question Q5

A beta particle passes a point 100\text{ nm} away from an alpha particle. What is the magnitude of the electrostatic force between the particles at that point?

1. (A)4.6 \times 10^{-14}\text{ N}
2. (B)4.6 \times 10^{-21}\text{ N}
3. (C)4.6 \times 10^{-39}\text{ N}
4. (D)5.7 \times 10^{-59}\text{ N}