If charge is distributed over a (curved) line, each differential charge dQ along the line produces a differential electric field:

\(dE = \frac{{dQ\;{r^2}}}{{4\pi \varepsilon }}{\hat a_r}\)

\(dE = \frac{{dQ}}{{4\pi \varepsilon {r^2}}}{\hat a_r}\)

\(dE = \frac{{dQ}}{{{r^2}}}{\hat a_r}\)

\(dE = \frac{{dQ}}{{4\pi \varepsilon r}}{\hat a_r}\)

If charge is distributed over a (curved) line, each differential charg

1.	If charge is distributed over a (curved) line, each differential charge dQ along the line produces a differential electric field:
A.	\(dE = \frac{{dQ}}{{4\pi \varepsilon {r^2}}}{\hat a_r}\)
B.	\(dE = \frac{{dQ\;{r^2}}}{{4\pi \varepsilon }}{\hat a_r}\)
C.	\(dE = \frac{{dQ}}{{{r^2}}}{\hat a_r}\)
D.	\(dE = \frac{{dQ}}{{4\pi \varepsilon r}}{\hat a_r}\)
Answer» B. \(dE = \frac{{dQ\;{r^2}}}{{4\pi \varepsilon }}{\hat a_r}\)

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If charge is distributed over a (curved) line, each differential charge dQ along the line produces a differential electric field:

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