Two very large thin conducting plates having same cross sectional area are placed as shown in figure. They are carrying chaerges `Q` and `3Q`, respectivley. The variation of electric field as as function at x(for `x=0` to `x=3d`) will be best represented as by

Options

A.
B.
C.
D.

Answer

C

Explanation

Using the formula for electric field produced by large sheet `E=Q/(2Ain_(0))`
we get
`E_(A)=(4Q)/(2Aepsilon_(0))(-hati) , E_(B)=(2Q)/(2Aepsilon_(0)).(-hati), E_(C)=(4Q)/(2Aepsilon_(0))(+hati)`