Electric field from charged rod

Electricity and Magnetism Level 2

An infinitely long rod lies along the positive direction of the x x -axis with one end at the origin. It carries a uniform charge density of λ C/m. \lambda \text{ C/m.} Find the magnitude of electric field at the point x = − a x = -a on the x-axis with a > 0. a > 0.

λ a 4 π ε 0 \frac{\lambda a}{4 \pi \varepsilon_{0}} λ a 2 4 π ε 0 \frac{\lambda a^2}{ 4 \pi \varepsilon_{0}} λ 4 π ε 0 a \frac{\lambda}{ 4 \pi \varepsilon_{0} a} λ 4 π ε 0 a 2 \frac{\lambda}{ 4 \pi \varepsilon_{0} a^2}

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Srinivasa Satti by Srinivasa Satti

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1 solution

Archit Agrawal
Sep 19, 2016

Use dimension analysis as there is only 1 option satisfying the dimensions of electric field.

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