The adjacent diagram shows a charge \( +Q \) held on an insulating support \( S \) and enclosed ...

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The adjacent diagram shows a charge \( +Q \) held on an insulating support \( S \) and enclosed by a hollow spherical conductor. \( O \) represents the centre of the spherical conductor and \( P \) is a point such that \( O P=x \) and \( S P=r \). The electric field at point \( P \) will be
[AMU PMT 2009]
(a) \( \frac{Q}{4 \pi \varepsilon_{0} x^{2}} \)
(b) \( \frac{Q}{4 \pi \varepsilon_{0} r^{2}} \)
(c) 0
(d) None of the above
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