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Four spheres each of different radii named a,b,c,d are given. Each is solid, insulating and uniformly charged. The variation of electric field with distance r from the centre is given. Straight portion of curve c and d is overlapping and straight portion of curve a and b is overlapping. Select the correct statement(s).

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Radius of sphere $a <$ Radius of sphere b

Radius of sphere $a >$ Radius of sphere b

Volume charge density of $c >$ volume charge density of b

Volume charge density of $c <$ volume charge density of b

answer is B, C.

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Detailed Solution

$E = \frac{ρ r}{3 \in_{0}}$
Slope of E-r graph gives $ρ$

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