Electrostatic Force and Electric Field (id: df000251f)

本题目来源于试卷: Electrostatic Force and Electric Field，类别为 美国物理杯赛(Physics Bowl)

[单选题]
17.43: A semi-circle has radius R, tot6jjjml4gti t,tbz:2j8 pvla x0 :.;wsal charge Q, an/k7b ypvean(.d a charge per unit length/kn e (7v.bayp given as $λ=λ_0cosθ$ with θ defined in the figure and $λ_0$ a positive constant. Which one of the following choices gives the electric field strength at the point labeled P?

A. 0
B. $\frac{2k_eλ_0}{R^{2}}$
C. $\frac{k_eQλ_0}{R}$
D. $\frac{2K_eQλ_0}{\Pi;R^{2}}$
E. $\frac{\Pi;k_eλ_0}{2R}$


参考答案:  E


本题详细解析: 暂无

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