Why does a spherical conductor retain its charge for a long time in comparison with the conductors of any other shape?

Why does a spherical conductor retain its charge for a longer time in comparison with conductors of any other shape?

What should be the shape of a conductor to retain its charge?

Why does the conductor refer to Valli as ‘madam’?

Asseration: A point charge q is placed at centre of spherical cavity inside a spherical conductor as shown. Another point charge Q is placed outside the conductor as shown. Now as the point charge Q is pushed away from conductor, the potential difference (V_(A) - V_(B)) between two points A and B within the cavity of sphere remains constant. Reason: The electric field due to charges on outer surface of conductor and outside the conductor is zero at all points inside teh conductor.

Why does the conductor call Valli ‘madam’?

A hollow spherical conductor of radius 2m carries a charge of 1nC . The electric potential at the centre of the spherical conductor is