MDCAT Physics MCQ #1538

Two charges, +4 μC and -6 μC, are separated by 3 meters. What is the electric force between them? (k = 9×10⁹ N·m²/C²)

MDCAT Physics MCQ #1538

  1. Question 1

    Q1. Two charges, +4 μC and -6 μC, are separated by 3 meters. What is the electric force between them? (k = 9×10⁹ N·m²/C²)

    • A) 36×10⁻³ N (attraction)
    • B) 24×10⁻³ N (repulsion)
    • C) 12×10⁻³ N (attraction)
    • D) 6×10⁻³ N (repulsion)

    Answer: 36×10⁻³ N (attraction)

    Explanation: Coulomb's Law F=k|q1q2|/r². Option C fails because it uses k=12×10⁹ instead of 9×10⁹.