1) W=ΔKE=−qΔϕ=−1⋅(10−50)=40(J)W=\Delta KE=-q\Delta \phi=-1\cdot(10-50)=40(J)W=ΔKE=−qΔϕ=−1⋅(10−50)=40(J)
W=Fd=qEdW=Fd=qEdW=Fd=qEd
qEd=40→d=40/(qE)=40/(1⋅100)=0.4(m)qEd=40\to d=40/(qE)=40/(1\cdot100)=0.4(m)qEd=40→d=40/(qE)=40/(1⋅100)=0.4(m)
or
2) E=−Δϕd→d=−ΔϕE=−10−50100=0.4(m)E=-\frac{\Delta\phi}{d}\to d=-\frac{\Delta\phi}{E}=-\frac{10-50}{100}=0.4(m)E=−dΔϕ→d=−EΔϕ=−10010−50=0.4(m)
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