267841 Two concentric shells of radii $R$ and $2R$ have given charges $q$ and $-2q$ as shown in figure. In a region $r<R$

a) $\mathbf{E}=\mathbf{0}$
b) $E\ne 0$
c) $\mathrm{V}=0$
d) $\mathrm{V}\ne 0$
Choose the correct answer

267840 A circular ring carries a uniformly distributed positive charge. The electric field ( $E$ ) and potential (V) varies with distance (r) from the centre of the ring along its axis as
a)


b)


d)
Choose the correct answer

267841 Two concentric shells of radii $R$ and $2R$ have given charges $q$ and $-2q$ as shown in figure. In a region $r<R$

a) $\mathbf{E}=\mathbf{0}$
b) $E\ne 0$
c) $\mathrm{V}=0$
d) $\mathrm{V}\ne 0$
Choose the correct answer