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A positive charge ‘Q’ is distributed uniformly throughout an insulated sphere of radius R, centered at origin. A positive charge ‘Q’ is placed at x = 2R on the x-axis. The magnitude of the electric filed at on the x-axis will be
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Correct option is D
E¯=E¯1+E¯2E=Q4πϵ0x1R3−1x22=Q4πϵ0R/2R3−1(3R/2)2=Q72πϵ0R2
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In a uniformly charged sphere of total charge Q and radius R, the electric field E is plotted as a function of distance from the centre. The graph which would correspond to the above is
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