dE=kdqx2dq=λdxλ=2nC/mdq=2dxnCdE=k2dxx2E=2k∫12dxx2E=2k(−1x)12=k×10−9N/CE=8.99×109×10−9N/CE=8.99N/CdE=k\dfrac{dq}{x^2}\\ dq=\lambda{dx}\\ \lambda=2nC/m\\ dq=2dxnC\\ dE=k\dfrac{2dx}{x^2}\\ E=2k\int_1^2\dfrac{dx}{x^2}\\ E=2k(\frac{-1}{x})_1^2=k\times10^{-9}N/C\\ E=8.99\times10^9\times10^{-9}N/C\\ E=8.99N/C\\dE=kx2dqdq=λdxλ=2nC/mdq=2dxnCdE=kx22dxE=2k∫12x2dxE=2k(x−1)12=k×10−9N/CE=8.99×109×10−9N/CE=8.99N/C
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