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Five charges each q are placed at five c...

Five charges each `q` are placed at five corners regular pentagon. Distance from corner to the centre of pontagon is `r`. Then `(K=(1)/(4pi epsilon_(0)))`

A

potential at centre is `(5kq)/(r)`

B

potential at centre is zero

C

electric field at centre is non-zero

D

electric field at centre is zero

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The correct Answer is:
A, D
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