The electric field E due to any point charge is defined as `E=underset (q rarr 0)lim F/q`, while q is the test charge and F is the force acting on it. What is the physical signification of `underset (q rarr 0)lim` in this expression?

Sketch the electric lines of force due to point charges q < 0

Sketch the electric lines of force due to point charges q > 0

Find electric field due to solid sphere of charge q at a point outside.

In the electric field of a point charge q, a certain charge is carried from point A to B, A to C,A to D and A to E. Then the work done

What is the value of the underset(h rarr0) Lt ((log(e+h) - log e)/(h) ?

We define the electric field strength as: vecE = underset (q_0 rarr0)lim vecF/q_0 Keeping in mind that minimum value of the charge that exists in nature cannot be less than e = 1.6 xx 10^-19 C , how can we justify the above definition?

The electric potential at a point in the electric field is V. What is the electric potential energy of a charge q_0 placed at that point?