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Three infinite planes each with uniform ...

Three infinite planes each with uniform surface charge density +`sigma` are kept in such a way that the angle between any two plate is `60^(@)`. The electric field at centre of triangle

A

`(sigma)/( 2 in_(0)) ( sqrt(3) hati + sqrt(3) hatj)`

B

`(sigma)/(2 in_(0)) ( sqrt(3) hatj)`

C

`(sigma)(2 in_(0)) ( sqrt(3) hatj)`

D

Zero

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The correct Answer is:
D

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