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A thick metallic shell has inner radius a and outer radius b. A point charge q is placed at its centre and surface charge density of its outer surface is $σ c o u l / m^{2} .$ .
Choose the correct statement related to the potential of the shell .

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Potential of the outer surface is more than that of the inner surface because it carries more charge

Potential of the outer surface is more than that of the inner surface because it is positively charged

Both the surfaces have equal potential

The potential of the shell is $\frac{σ b}{ϵ_{0}}$

answer is C, D.

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Detailed Solution

As conductor is an EPS, so potential at every point of it would be same.
Potential of conductor is $\frac{σ \times 4 π b^{2}}{4 π ϵ_{0} b} = \frac{σ b}{ϵ_{0}}$

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