If an insulated non-conducting sphere of radius R has charge density ρ . electric field at a distan

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1. Electric Charges and Fields

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If an insulated non-conducting sphere of radius $R$ has charge density $\rho .$ The electric field at a distance $r$ from the centre of sphere $(r < R)$ will be

A

$\frac{{\rho R}}{{3\,{\varepsilon _0}}}$

B

$\frac{{\rho r}}{{{\varepsilon _0}}}$

C

$\frac{{\rho r}}{{3\,{\varepsilon _0}}}$

D

$\frac{{3\rho R}}{{{\varepsilon _0}}}$

Solution

For non-conducting spher ${E_m} = \frac{{k.Qr}}{{{R^3}}} = \frac{{\rho r}}{{3\,{\varepsilon _0}}}$

Standard 12

Physics

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