Question

A charge of +1C is placed at the centre of a spherical shell of radius 10cm.what will be work done in moving a charge of+1 micro coulamb on its surface through a distance of 5 cm

Answer 1

Atoms and molecules have the same number of protons as electrons and are neutral (without overall charge).  Electrons can be transferred from one object to another.  When this happens, there is an excess of electrons in one place and a deficiency of electrons in another. Charge is the result of an excess or deficiency of electrons.  Where an object has excess electrons, the object is negatively charged. Where there is a deficiency of electrons, the object is positively charged. Electric charge is usually represented in equations by the letter q or