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Let three be a spherically symmetric charge distribution with charge density varying as $\rho (r) = \rho_0 = \rho_0 \bigg( \large\frac{5}{4} -\frac{r}{R} \bigg)$ upto $r = R,$ and $\rho(r) = 0$ for $r > R,$ distance from the origin. The electric field at a distance $r(r < R)$ from the origin is given by

1 Answer

$(B)\; \large\frac{ \rho_0 r}{4 \in_0}\bigg( \frac{5}{4} -\frac{r}{R}\bigg)$
Hence B is the correct answer.
answered Jun 6, 2014 by meena.p