Electric Field Formula

Electric Field Formula

An electric field surrounds an electric charge while simultaneously exerting force on other charges in the field. It either attracts or repels them. The electric field is sometimes shortened as E-field. The electric field is formally described as a vector field that relates each point in space with the (electrostatic or Coulomb) force/unit of charge exerted on an infinitesimal positive test charge that is at rest at that location. The SI unit for electric field strength is volt/meter. (V/m). Newtons/coulomb (N/C) is also a useful measure for measuring electric field strength. Electric charges create electric fields, as do time-varying magnetic fields. Learn the electric field formula here.

What is Electric Field Formula?

An electric field surrounds an electric charge while simultaneously exerting force on other charges in the field. It either attracts or repels them. E-field is a common abbreviation for the electric field. The Electric Field Formula is formally defined as a vector field that correlates the (electrostatic or Coulomb) force or unit of charge exerted on an infinitesimal positive test charge at rest at each location in space.Volt/meter is the SI unit of electric field strength. (V/m). Newtons/coulomb (N/C) can also be used to measure the strength of an electric field. Electric charges or time-varying magnetic fields create electric fields.

The Electric Field formula is E=F/q

The electric field is formally defined as a vector field associated with each location in space, the force per unit charge exerted on a positive test charge at rest at that place. The electric charge or time-varying magnetic fields create the electric field. At the atomic level, the electric field is responsible for the attractive forces that hold the atomic nucleus and electrons together.

Formula and Derivation of Electric Field

The Electric Field Formula “field” is the area around an electric charge that may be observed to be influenced by it. When the additional charge is introduced into the field, the presence of an electric field may be felt. Depending on the composition of the incoming charge, the electric field will either attract or repel it.Any electric charge may be thought of as having an electric field. The charge and electrical force operating in the field define the electric field’s strength or intensity.

The Electric Field Formula for the electric field is

The Electric Field Formula E = F/q

Where E represents the electric field

F (a force acting on the charge) (a force acting on the charge)

The charge q is surrounded by its electric field.

When two charges, Q and q, are separated by a distance r, the electrical force may be defined as

F= k Qq/r2

F is the electrical force.

The two charges are Q and q.

R is the distance between the two charges.

Coulomb’s constant is K.

As a result, the electric field E may be defined as

E = F/q

This is the electric field felt by charge Q as a result of charge q.

This electric field intensity formula is defined by Coulomb’s law.

If there is a voltage V across a distance r, the electric field is defined as

E= V/r

The SI unit for an electric field is N/c, which stands for Newton/Coulomb.

If there are many electric fields in a location, the electric fields add up vectorially, taking the field’s direction into account.

Properties of Electric Field

Electric field lines have varying qualities. Some of the properties are listed below.

  • Field lines never cross each other.
  • They’re perpendicular to the surface charge.
  • The intensity of an electric field grows as the field lines become closer together, indicating a greater force. In contrast, when field lines move apart, the field diminishes.
  • The number of field lines is exactly proportional to the amount of the charge.
  • These lines often begin with positive charges and conclude with negative charges, indicating the direction of the electric field.

Solved Example Electric Field Formula

Example 1 : A force of 10 N is acting on the charge 20 μ C at any point. Find the electric field intensity at that point.

Solution

Given

Force F = 10 N

Charge q = 20 μ C

Electric field formula is given by

E = F / q

= 10 N / 20×10−6C

E = 0.5 × 105 N/C.

Physics Related Formulas
Electric Field Formula Poynting Vector Formula
Gross Profit Formula Refraction Formula
Mass Formula Sound Intensity Formula
Capacitance Formula Uniform Circular Motion Formula
Centripetal Force Formula Thermal Expansion Formula
Distance Speed Time Formula Thermal Energy Formula
Ohms Law Formula Amperes Law Formula
Refractive Index Formula Horsepower Formula
Wavelength Formula Lattice Energy Formula
Stress Formula Length Contraction Formula

FAQs (Frequently Asked Questions)

1. What is an Electric Field?

An electric field at a certain area represents the force applied to a unit positive test charge put at that site.

2. What is a point charge?

A point charge is a theoretical charge that exists at a specific location in space.

3. What is electric flux?

Electric flux is the total number of electric field lines moving through a given region per unit time.