!An E-field, also known as an electric field, is a region in space where electrically charged particles, such as electrons or protons, experience a force due to the presence of other charged particles.
The E-field due to charges is calculated using Coulomb's Law, which states that the magnitude of the electric field at a given point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the charges.
The direction of the E-field at a given point is always in the direction that a positive test charge would experience a force if placed at that point. So, the direction of the E-field due to positive charges is away from the charge, while the direction of the E-field due to negative charges is towards the charge.
The SI unit for the E-field due to charges is newtons per coulomb (N/C).
Yes, the E-field due to charges can exist in a vacuum, as long as there are charged particles present. This is because the E-field is a property of the space surrounding the charges, rather than a physical substance.