Two non-conducting infinite plane sheets having charges distributed on four faces as shown in figure are placed parallel to each other. The magnitude of electric field intensities at three points A, B and C are: (S is surface area of the sheet)

Options

A. `"Zero "(Q)/(in_(0)S),"zero"`
B. `(5Q)/(6in _(0) S), (Q)/(2 in_(0)S),"zero"`
C. `(5Q)/(6 in_(0)S), (Q)/(in_(0) S), (Q)/(3 in_(0)S)`
D. `"Zero "(Q)/(2 in_(0)S),"zero"`

Answer

B

Explanation

`vecE_(A)=1/(2in_(0)S) [(2Q)/(3)-Q/3-Q/2-(3Q)/(2)]hati=(-5Q)/(6in_(0)S) hati, vecE_(B)=1/(2in_(0)S) [(2Q)/(3)+(Q)/(E)-Q/2-(3Q)/(2)]hati=(-Q)/(2in_(0)S)hati`
`vecE_(C)=(1)/(2in_(0)S) [(2Q)/(3)+(Q)/(3)+(Q)/(2)-(3Q)/(2)]=0`