1.

Five point charges each of charge + q are placed on five vertices of a regular of side h as shown in the figure. Then

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the forces on (-Q) at O due to charges +q at A and D are balanced.
the forces on (-q) due to charges at D and E are balanced.
THERESULTANT force on ` -q " at "O" is "1/(4 pi epsilon_(0))q^(2)/h^(2)`along OE.
Theresultant force on - q at O is `1/(4piepsilon_(0))q^(2)/h^(2)` along OC.

Answer :A::D


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