Adjacent diagram shows a charge +Q held on an insulating support S and enclosed by a hollow spherica

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2. Electric Potential and Capacitance

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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 $OP = x $ and $SP = r$ . The electric field at point $P$ will be

A

$\frac{Q}{{4\pi { \in _0}{x}}}$

B

$\frac{Q}{{4\pi { \in _0}{r^2}}}$

C

$0$

D

None of the above

Solution

Total charge will induce on the surface of conductor and will be distributed uniformly on the surface

$\therefore E = \frac {Q}{4\pi \varepsilon _0x}$

Standard 12

Physics

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