試卷名稱:111年 - 111 國立臺灣大學_轉學生招生考試:普通物理學(A)#125314
年份:111年
科目:研究所、轉學考(插大)◆普通物理學
17. A negatively charged particle of mass m and charge q< 0 is restricted to move freely along the axis of a circular ring of radius R. A positive charge is uniformly distributed over the ring with a charge density (charge per unit length) λ> 0. Suppose the vertical coordinate of the particle relative to the center of the circular ring is y and y << R. Find the period of oscillation for small y:
(A)2πR
(B) 2πR
(C) 2πR
(D)πR