Question

Find the magnitude of the electric field at a point 4 cm away from a line charge of density `2 xx 10^(-6) C m^(-1)`.
A. `4 xx 10^(5) NC^(-1)`
B. `2 xx 10^(6) NC^(-1)`
C. `8xx10^(7) NC^(-1)`
D. `12 xx 10^(7) NC^(-1)`

Answer 1

Correct Answer - B
For a charged cylinder
`E=( lambda)/( 2pi epsi_(0)r)=( 4 xx 10^(-6) xx 18xx10^(9))/(3.6 xx 10^(-2))`