問題詳情
二、多重選擇題
16. 如圖，一均勻帶負電的金屬圓環，帶電量-Q，環半徑為 R，P 為中垂軸上與 O 距離 x 的點，則下列何者正確？
(A) P 點電位
(B) P 點電場量值為
(C) 將一正電荷 +q 自 P 點靜止釋放，則此電荷會作簡諧運動
(D) 欲將一正電荷 +q 由 P 點等速移至無窮遠，外力需作負功
(E) 中心 O 點電場為零但電位不為零。
16. 如圖，一均勻帶負電的金屬圓環，帶電量-Q，環半徑為 R，P 為中垂軸上與 O 距離 x 的點，則下列何者正確？
(A) P 點電位
(B) P 點電場量值為
(C) 將一正電荷 +q 自 P 點靜止釋放，則此電荷會作簡諧運動
(D) 欲將一正電荷 +q 由 P 點等速移至無窮遠，外力需作負功
(E) 中心 O 點電場為零但電位不為零。
參考答案
答案：A,E
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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