In a regular polygon of \( n \) sides, each corner is at a distance...

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In a regular polygon of \( n \) sides, each corner is at a distance \( r \) from the centre. Identical charges
\( \mathrm{P} \) are placed at \( (n-1) \) corners. At the centre, the

W magnitude of electric field intensity is \( E \) and the potential is \( V \). The ratio \( V / E \) is
(a) \( r n \)
(b) \( r(n-1) \).
(c) \( (n-1) / r \)
(d) \( r(n-1) / n \)
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