Question

An infinite line charge with uniform charge density of 4 nC/m is placed along z-axis. The value of electric field intensity vector at (0, 3, 4) m is _____$\widehat{a_y}$ V/m.

• A. 24

Answer 1

The correct option is A 24
Electric field intensity, $\overrightarrow{E}=\frac{{\rho }_L}{2\pi {ϵ}_{0}r}\widehat{a_y}$

$=\frac{4\times {10}^{-9}}{2\pi \times 8.85\times {10}^{-12}\times 3}\widehat{a_y}=0.024\times {10}^3\widehat{a_y}V/m$

$=24\widehat{a_y}V/m$