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Two large, thin metal plates are paralle...

Two large, thin metal plates are parallel and close to each other. On their faces, the plates have surfaces charge densities of opposite sign and of magnitude `.177 xx 10^(-11)` coulomb per square metre. What is electric field
(i) to the left of the plates ?
(ii) to the right of the plates ?
(iii) in between the plates ?

Text Solution

Verified by Experts

(a) Fields due to both the plates will be equal and opposite so net field will be zero.
(b) Field outside the plates will be equal and opposite so net field will be zero
( c ) In between the plates the fields due to both the plates will be adding up so net field will be `(sigma)/(2epsilon_(0))+(sigma)/(2epsilon_(0))=(sigma)/(epsilon_(0))` from positive to negative plate
`:. E=(sigma)/(epsilon_(0))=(1.77xx10^(-11))/(8.85xx10^(-12))=2(N//C)`
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