A thin metallic spherical shell of radius r carries a charge q on its surface. A point charge q/2 is placed at its centre c and other charge +2q is placed outside the shell at a distance x from the centre . Find (i) the force on the charge at the centre of shell and at the point a, (ii) the electric flux through the shell.
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A point charge +2Q is placed at a point C outside the shell at ... another point charge +Q/2 IS placed at its centre. Find
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