CAPE Physics Unit 2 · 2016 · Paper 1 · Question Q33

The kinetic energy of a photoelectron is given as 7\text{ eV}. The velocity of the electron is

1. (A)1.6 \times 10^6\text{ m s}^{-1}
2. (B)1.1 \times 10^6\text{ m s}^{-1}
3. (C)6.2 \times 10^{11}\text{ m s}^{-1}
4. (D)2.5 \times 10^{12}\text{ m s}^{-1}