Kinetic Energy: an Electron Is Accelerated from Rest Through a Potential

Multiple Choice

Kinetic energy: An electron is accelerated from rest through a potential difference of 50.0 kV. What is the speed of the electron? (c = 3.00 × 10⁸ m/s, e = 1.60 × 10^-19 C, m_el = 9.11 × 10^-31 kg)

A) 1.24 × 10⁸ m/s
B) 1.33 × 10⁸ m/s
C) 3.24 × 10⁸ m/s
D) 3.33 × 10⁸ m/s
E) 4.12 × 10⁸ m/s