(a) A point charge `(+Q)` is kept in the vicinity of an uncharged conducting plate . Sketch electric field lines between the charge and the plate.
Two infinitely large plane thin parallel sheets having surface charge densities `sigma_(1)andsigma_(2)(sigma_(1)gtsigma_(2))` are shown in the figure . Write the magnitudes and directions of the fields in the regions marked II and III.

Explanation

(b) (i) For region II ,
`E_(II)=(1)/(2epsilon_(0))(sigma_(1)-sigma_(2))`
towards right side/from sheet A to sheet B.
(ii) For region III,
`E_(III)=(1)/(2epsilon_(0))(sigma_(1)+sigma_(2))`
towards right side/ away from the two sheets.