Calculate the magnitude of the electric field at point P in units of megaNewtons per Coulomb (mN/C)

In order to determine the magnitude of the electric field at point P, we need to have information about the charge of the point charge as well as the distance from the point charge to point P. This information is essential in applying the equation for the electric field in a point charge system.

The magnitude of the electric field due to a point charge can be calculated using the equation:

E = kQ/r^2

Where:

E is the electric field,

k is the electrostatic constant (9 x 10^9 Nm^2/C^2),

Q is the charge of the point charge, and

r is the distance from the point charge to the point of interest.

Without the charge of the point charge or the distance from the point charge to point P, we cannot determine the magnitude of the electric field at point P. Therefore, to accurately calculate the electric field at a specific point, additional information regarding the charge and distance is necessary.