Question

Infinite long wire having linear charge density 0.2 C/m. find electric intensity at a distance 2 m from wire?

• A. 1.8x${10}^9$ V/m
• B. 0.9x${10}^9$ V/m
• C. 2.7x${10}^9$ V/m
• D. 0.3x${10}^5$ V/m

Answer 1

The correct option is C 2.7x${10}^9$ V/m

Infinite long wire having linear charge density $=0.2c/m$

electric intensity at a distance $={2m}^{-}$

$E=\frac{1}{4\pi {ϵ}_0}\frac{2\lambda }{R}$

$=9\times {10}^9\times \frac{2\times 0.2}{2}$

$=2.7\times {10}^{9}v/m^1$