Determine the electric field strength of a point charge of 0.1 nC at a distance of 10 cm from it.

Given:
q = 0.1nC = 10 ^ -10 C
r = 10cm = 0.1m
k (coefficient of proportionality in C. Coulomb) = 9 * 10 ^ 9 (H ^ 2 * m ^ 2) / Kl ^ 2
To find:
E-?
E = (kq) / r ^ 2 = 90 N / Cl.

Since this is physics, you need to use formulas. The Coulomb formula is used here.

We denote tension by the letter – E;

The point charge is denoted by the letter – q;

The distance between them is r.