Potential Energy of Point-Charges: If an Electron Is Accelerated from Rest

question 17

Multiple Choice

Potential energy of point-charges: 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, ^m_el = 9.11 × 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