If an insulated non-conducting sphere of radius \( R \) has charge density \( \rho \). The elect...

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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 \( (rR) \) will be
\( P \)
(1) \( \frac{\rho \mathrm{R}}{3 \varepsilon_{0}} \)
(2) \( \frac{\rho r}{\varepsilon_{0}} \)
(3) \( \frac{\rho r}{3 \varepsilon_{0}} \)
(4) \( \frac{3 \rho \mathrm{R}}{\varepsilon_{0}} \)
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