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A square of side 20cm. Is enclosed by a surface of sphere of 80 cm. radius . Square and sphere have the same centre. Four charges `+2xx10^(-6)c,-5xx10^(-6)c,-3xx10^(-6)c,+6xx10^(-6)c` are located at the four corners of a square, Then out going total flux from spherical surface in `N-m^(3)//c` will be

A

zero

B

`(16pi) xx 10^(-6)`

C

`(8pi) xx 10^(-6)`

D

`(36pi) xx 10^(-6)`

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The correct Answer is:
A
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