If an Electron Is Accelerated from Rest Through a Potential

Multiple Choice

If an electron is accelerated from rest through a potential difference of 9.9 kV, what is its resulting speed? (e = 1.60 × 10^-19 C, k = 1/4πε₀ = 8.99 × 10⁹ N ∙ m²/C², mel = 9.11 x 10^-31 kg)

A) 5.9 × 10⁷ m/s
B) 4.9 × 10⁷ m/s
C) 3.9 × 10⁷ m/s
D) 2.9 × 10⁷ m/s