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Identical charges each of – q are placed at each corners of cube of side 'b'. Then electrostatic potential energy of charge  +q which is placed at the centre of the cube will be

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By Expert Faculty of Sri Chaitanya
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a
-42 q2π ε0b
b
-82 q2π ε0b
c
-4q23π ε0b
d
82q24π ε0b
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detailed solution

Correct option is C

Distance of center from the corner is  3b2  energy  q1q2r14πεoq-q4πεo3b2×8-4q23bπεo

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