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A spherical metal shell \( A \) of radius \( R_{A} \) and a solid metal sphere \( B \) of radius \( R_{B}\left(R_{A}\right) \) are kept far aprt and each is given charge ' \( +Q \) '. Now they are connected by a thin metal wire. Then
\( \mathrm{P} \)
(A) \( \mathrm{E}_{\mathrm{A}}^{\text {inside }}=0 \)
(B) \( Q_{A}Q_{B} \)
(C) \( \frac{\sigma_{\mathrm{A}}}{\sigma_{\mathrm{B}}}=\frac{R_{\mathrm{B}}}{R_{\mathrm{A}}} \)
(D) \( \mathrm{E}_{\mathrm{A}}^{\text {on surface }}\mathrm{E}_{\mathrm{B}}^{\text {on surface }} \)
W)
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