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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A conducting sphere of radius r is surrounded by a poorly conducting material of inner radius a and oueter radius b whose resistivity rho varies with rho = rho0r^3. Find teh resistance between the sphere and the outer surface of surrounding conducting material.

A conducting sphere of radius r is surrounded by a poorly conducting material of inner radius a and oueter radius b whose resistivity rho varies with rho = rho0r^3. Find teh resistance between the sphere and the outer surface of surrounding conducting material.

How many electrons per second pass through a section of wire carrying a current of 0.7 A?