14. The figure shows three parallel, infinite, nonconducting sheets of charge and their surface charge densities. (You see the cross section of the sheets.) What is the magnitude (N/C) of the net electric field at the point indicated? σ₁ = -2.00 µC/m² σ2 = +2.00 µC/m² σ3 = +2.00 µC/m²


(A) 3.39 × 105
(B)8.26 × 106
(C)9.18 × 103
(D)2.64 × 104
(E)1.31 × 106

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1. 題目解析 此題目要求計算在三個平行...
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