Three 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) NC^-1`
B. `NC^-1`
C. `NC^-1`
D. `20 NC^-1`

Answer

d

Explanation

`F = qE`
`W = q E xx 2 cos 60^(@)`
or `4 = 0.2 E xx 2 xx (1)/(2)` or `E = 20 NC^-1`.