Engineering & Technology
Undergraduate
急!!!求詳解，感謝高手們
17 圖22-27a中,某電荷+Q的粒子在點P產生量値
Ear的電場,已知點P與粒子相距R。圖 22-276 中,
該相同數量的電荷沿著一半徑R的圓弧均勻分佈,且
此圓弧的張角是0。圓弧的電荷在曲率中心P產生量
值爲 E 的電場。當0值是多少時,Earc = 0.500E part ?
arc
(提示:我們可能需要訴諸圖形解答。)
+Q
P
|—–R▬||
(a)
+Q//8/2/
0/2
(b)
R
P
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