A solid conducting sphere of radius a has a net positive charge \( 2 Q \). A conducting spherica...
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0A solid conducting sphere of radius a has a net positive charge \( 2 Q \). A conducting spherical shell of inner radius \( \mathrm{b} \) and outer radius \( \mathrm{c} \) is concentric with the solid sphere and has a net charge \( -Q \). The surface charge density on the inner and out surface of th spherical shell will be
(a) \( -\frac{2 Q}{4 \pi b^{2}}, \frac{Q}{4 \pi c^{2}} \)
(b) \( -\frac{Q}{4 \pi b^{2}}, \frac{Q}{4 \pi c^{2}} \)
(c) \( 0, \frac{Q}{4 \pi c^{2}} \)
(d) None of these
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