有一固定之均勻帶電圓環，半徑為R，帶電量為＋Q 。另有一點電荷質量為m，帶電量為－q，被侷限在圓環的中心垂直軸上運動。若點電荷在離圓環中心 R處被自由釋放，則該點電荷到達環心時之速率為何？ (

問題詳情

2. 有一固定之均勻帶電圓環，半徑為R，帶電量為＋Q 。另有一點電荷質量為m，帶電量為－q，被侷限在圓環的中心垂直軸上運動。若點電荷在離圓環中心

R處被自由釋放，則該點電荷到達環心時之速率為何？
(A)

(B)

(C)

(D)

。

參考答案

答案：C
難度：非常困難0
統計：A(0),B(0),C(0),D(0),E(0)

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