The discharging current in the atmosphere due to the small conductivity of air is known to be 1800 A on an average over the globe. Why then does the atmosphere not discharge itself completely in due course and become electrically neutral ? In other words, what keeps the atmosphere charged?

Why is an atom electrlcally neutral ?

What are called electrically charged and electricially neutral bodies?

Why does the electrical conductivity of semi conductors increase with rise in temperature ?

A long, hollow conducting cylinder is kept coaxially inisde another long, hollow conducting cylinder of larger radius. Both the cylinders are initially electrically neutral.

How can the neutral body be charged electrically ?

An early model for an atom considered it to have a positively charged point nucleus of charge Ze, surrounded by a uniform density of negative charge up to a radius R. The atom as a whole is neutral. For this model, what is the electric field at a distance r from the nucleus ?

Why is electrical power required at all when the elevator is descending ? Why should there be a limit on the number of passengers in this case ?

Why are electric field lines perpendicular at a point on an equipotential surface of a conductor ?