To understand the electric potential and electric field of a point charge in three dimensions Consider a positive point charge q, located at the origin of three-dimensional space. Throughout this problem, use k in place of 14?

The magnitude of the electric field at distance r from the point charge q is

Explanation:

Suppose, Find E(r), the magnitude of the electric field at distance r from the point charge q.

We know that,

The electric field is proportional to the point charge and inversely proportional to the square of the distance from the charge point .

In mathematically,

Where, q = charge point

R = distance from charge point

Hence, The magnitude of the electric field at distance r from the point charge q is

e) none of the above answers are correct

none, its a machine