試卷名稱:112年 - 112 國立中興大學_學士後醫學系招生考試_學士後醫學系甲、乙組:物理#113978
年份:112年
科目:學士後西醫-物理
37. Charge Q is spread uniformly along the circumference of a circle of radius R. A point particle with charge q is placed at the center of this circle. The total force exerted on the particle can be calculated by Coulomb's law:
(A) just use R for the distance
(B) just use 2R for the distance
(C) just use 2πR for the distance
(D) the result of the calculation is zero
(E) none of the above.