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Three infinitely long charge thin sheets...

Three infinitely long charge thin sheets are placed as shown. The electric field at point P is,

A

`(2 sigma)/(epsilon_(0))hat(k)`

B

`-(sigma)/(epsilon_(0))hat(k)`

C

`(4 sigma)/(epsilon_(0))hat(k)`

D

`(-4 sigma)/(epsilon_(0))hat(k)`

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