There is an electric field E in the x - direction. If the work done by the electric field in moving a charge of `0.2 C` through a distance of `2 m` along a line making an angle `60^(@)` with the x- axis is `4 J`, then what is the value of E ?

Options

A. `sqrt(3)N//C`
B. `4N//C`
C. `5N//C`
D. None of these

Answer

D

Explanation

`W = qV = qE.d`
`rArr 4 = 0.2 xx E xx (2 cos 60^(2))`
`= 0.2 E xx (2 xx 0.5)`
`:.E = (4)/(0.2) = 20 NC^(-1)`