Why is earth considered as zero of potential in practice ? Justify.

Surface of Earth is considered at ...... gravitational potential (in practice).

Assertion : For practical purpose, the earth is used as a reference at zero potential in electrical circuits. Reason : The electrical potential of a sphere of radius R with charge Q uniform distributed on the surface is given by Q/(4pivarepsilon_0R) . Which one of the following statements is correct ?

Why is inbreeding considered a harmful practice?

Statement I : For practical purpose, the potential of the earth is used as a reference, and is assumed to be the zero of potential in electrical circuits. Statement II : The electrical potential ofa sphere of radius R, with charge Q uniformly distributed on its surface is given by Q/(4 pi epsilon_(0)R) .