MDCAT Physics MCQ #1557

What electric field is required to suspend a 2 g oil drop with charge -3e in air?

MDCAT Physics MCQ #1557

  1. Question 1

    Q1. What electric field is required to suspend a 2 g oil drop with charge -3e in air?

    • A) 2.1 × 10⁵ N/C
    • B) 6.5 × 10⁶ N/C
    • C) 9.8 × 10⁴ N/C
    • D) 1.3 × 10³ N/C

    Answer: 6.5 × 10⁶ N/C

    Explanation: E = mg/q. Mixes gravitational acceleration with electrostatic force magnitude.