Three large conducting parallel sheets are placed at a finite from each other as shown in figure. Find out electric intensity at point A, B, C & D.

Explanation

for point A

`vec(E)_("net") = vec(E)_(Q) + vec(E)_(3Q) + vec(E)_(+2Q) = -(Q)/(2A epsilon_(0)) hat(i)`
`- (3Q)/(2A epsilon_(0)) hat(i) + (2Q)/(2A epsilon_(0)) hat(i) = -(Q)/(A epsilon_(0)) hat(i)`

`vec(E)_("net") = vec(E)_(3Q) + vec(E)_(-2Q) + E_(Q) = -(3Q)/(2Aepsilon_(0)) hat(i)`

`vec(E)_("net") = vec(E)_(Q) + vec(E)_(3Q) + vec(E)_(-2Q) = + (Q)/(2A epsilon_(0)) hat(i) - (3Q)/(2A epsilon_(0)) hat(i) - (2Q)/(2A epsilon_(0)) hat(i) = -(2Q)/(A epsilon_(0))hat(i)`

`vec(E)_("net") = vec(E)_(Q) + vec(E)_(3Q) + vec(E)_(-2Q)`
`= (Q)/(2A epsilon_(0)) hat(i) + (3Q)/(2A epsilon_(0)) hat(i) - (2Q)/(2A epsilon_(0)) hat(i) = (Q)/(A epsilon_(0)) hat(i)`