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A nonconducting ring of radius \( R \) has uniformly distributed positive charge \( Q \). A small part of the ring, of length \( \mathrm{d} \), is removed \( (\mathrm{d}R) \). The electric field at the centre of the ring will now be
\( \mathrm{P} \)
(A) directed towards the gap, inversely proportional to \( \mathrm{R}^{3} \).
(B) directed towards the gap, inversely proportional to \( \mathrm{R}^{2} \).
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(C) directed away from the gap, inversely proportional to \( \mathrm{R}^{3} \).
(D) directed away from the gap, inversely proportional to \( \mathrm{R}^{2} \).
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