Question Detail
Question
Magnitude of electric field where force on electron equals its weight? m_e = 9.11×10⁻³¹ kg, e = 1.6×10⁻¹⁹ C.
Correct Answer
Option D is the correct answer.
Detailed Explanation
Weight = mg = 9.11e-31 × 9.8 = 8.93e-30 N. E = F/q = 8.93e-30 / 1.6e-19 = 5.58×10⁻¹¹ N/C.
Hint
E = mg/q.