A solid conducting sphere of radius a is surrounded by a thin uncharged concentric conducting shell of radius 2a. A point charge q is placed at a distance 4a from common centre of conducting sphere and shell. The inner sphere is then grounded. The charge on solid sphere is

A solid conducting sphere of radius a is surrounded by a thin uncharge

1.	A solid conducting sphere of radius a is surrounded by a thin uncharged concentric conducting shell of radius 2a. A point charge q is placed at a distance 4a from common centre of conducting sphere and shell. The inner sphere is then grounded. The charge on solid sphere is
Answer» A solid conducting sphere of radius $a$ is surrounded by a thin uncharged concentric conducting shell of radius $2 a$ . A point charge $q$ is placed at a distance $4 a$ from common centre of conducting sphere and shell. The inner sphere is then grounded. The charge on solid sphere is

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A solid conducting sphere of radius a is surrounded by a thin uncharged concentric conducting shell of radius 2a. A point charge q is placed at a distance 4a from common centre of conducting sphere and shell. The inner sphere is then grounded. The charge on solid sphere is

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