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The figure shows three infinite non-cond...

The figure shows three infinite non-conducting plates of charge perpendicular to the plane of the paper with charge per unit area `+sigma, +2sigma` and `-sigma`. Find the ratio of the net electric field at that point a to that at point B.

Text Solution

Verified by Experts

The correct Answer is:
zero
Charge on outer plates `=(sigmaA+2sigmaA-sigmaA)/2=sigmaA`
Charge distribution
Field at A: `E_(A)=0`
Field at B :
`E_(B)=(2sigma)/epsilon_(0) :. E_(A)/E_(B)=0`
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