The potential of the earth is zero. Explain the statement.

The gravitational potential energy of a body on the surface of the earth is -6.4xx10^6 joule. Explain the statement.

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) .

The capacitance of a conductor is 9muF . Explain the statement with reference to charge and potential.

As you have learnt in the text ,a geostationary satellite orbits the earth at a height of nearly 36000 km from the surface of the earth. What is the potential due to earth's gravity at the site of this satellite? (Take the potential energy at infinity to be zero.) Mass of the earth= 6.0xx10^(24)kg , radius =6400 km.

2nd ionisation potential of Be is greater than the 1st ionisation potential of B but less than 2nd ionisation potential of B - explain .