Why Can one ignore quantisation of electric charge when dealing with macroscopic i.e., large scale charges?

What is the meant by quantisation of electric charge?

Define S.I. unit of electric charge.

When an electric cell is charged, then:

What is the magntiude of transverse acceleration produced in the motion of the electric charge, when it passes through the electric field?

Figure 2.34 shows a charge array known as an electric quadrupole. For a point on the axis of the quadrupole, obtain the dependence of potential on r for r/a » 1, and contrast your results with that due to an electric dipole, and an electric monopole (i.e., a single charge). :

One word for the following statement: The sum of gradients of mass and electric charge for an ion across a membrane.