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Electrostatics question

2023 · 10 Apr · Shift 1 · Q71
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Electrostatics question

2023 · 10 Apr · Shift 1 · Q71

JEE MainPhysicsElectrostaticsNumerical+4 / −1
Three concentric spherical metallic shells X, Y and Z of radius a, b and c respectively [a < b < c] have surface charge densities σ,−σ\sigma,-\sigmaσ,−σ and σ\sigmaσ respectively. The shells X and Z are at same potential. If the radii of X & Y are 2 cm and 3 cm, respectively. The radius of shell Z is ‾\underline{\hspace{2cm}}​ cm.
Numerical answer
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