A point charge +2 nC is fixed at the origin

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

A point charge +2 nC is fixed at the origin. A uniform electric field of 5.0 × 10⁴ N C⁻¹ acts along +x. Find the magnitude of the net electric field at a point 0.10 m to the right of the charge on the x-axis. (Take k = 9 × 10⁹ N m² C⁻².) (a) 6.80×104  N C−16.80\times 10^{4}\;\text{N C}^{-1} towards +x+x (b) 5.18×104  N C−15.18\times 10^{4}\;\text{N C}^{-1} towards +x+x (c) 4.82×104  N C−14.82\times 10^{4}\;\text{N C}^{-1} towards +x+x (d) 5.18×104  N C−15.18\times 10^{4}\;\text{N C}^{-1} towards −x-x

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