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A spherical silver electrode of radius 8...

A spherical silver electrode of radius 8cm is concentric with a spherical metal shell of radius 10cm. The inter space contains an insulating material of resistivity `10^(6)Omega`m. Compute the resistance of the insulator.
[Hint: Resistance of a shell of radius z = `rho(dz)/(4piz^(2)`. Integrate from z = 8 to z=100

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The correct Answer is:
`1.99 xx 10^(5)Omega`
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