Shown in the figure are two point charges $+Q$ and $-Q$ inside the cavity of a spherical shell. The charges are kept near the surface of the cavity on opposite sides of the centre of the shell. If $\sigma _1$ is the surface charge on the inner surface and $Q_1$ net charge on it and $\sigma _2$ the surface charge on the outer surface and $Q_2$ net charge on it then
Shown in the figure are two point charges $+Q$ and $-Q$ inside the cavity of a spherical shell. The charges are kept near the surface of the cavity on opposite sides of the centre of the shell. If $\sigma _1$ is the surface charge on the inner surface and $Q_1$ net charge on it and $\sigma _2$ the surface charge on the outer surface and $Q_2$ net charge on it then
- [JEE MAIN 2015]
- A
$\begin{array}{l}
{\sigma _1}\, \ne \,0,\,\,{Q_1}\, = \,0\\
{\sigma _2}\, = \,0,\,\,{Q_2}\, = \,0
\end{array}$ - B
$\begin{array}{l}
{\sigma _1}\, \ne \,0,\,\,{Q_1}\, = \,0\\
{\sigma _2}\, \ne \,0,\,\,{Q_2}\, = \,0
\end{array}$ - C
$\begin{array}{l}
{\sigma _1}\, = \,0,\,\,{Q_1}\, = \,0\\
{\sigma _2}\, = \,0,\,\,{Q_2}\, = \,0
\end{array}$ - D
$\begin{array}{l}
{\sigma _1}\, \ne \,0,\,\,{Q_1}\, \ne \,0\\
{\sigma _2}\, \ne \,0,\,\,{Q_2}\, \ne \,0
\end{array}$
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