Electric Field Calculator

Real-time calculation tool for electric field strength, force, and potential in electromagnetism

Electromagnetism Tool

Charge Parameters

Charge Value (Q) C
Charge Type
Distance (r) m

Calculation Options

Medium (ε)
Test Charge (q) C

Advanced Controls

Calculation Results

Electric Field Strength
899.18 N/C

Force per unit charge at the specified distance

Electric Force

8.99e-7 N

Electric Potential

89.92 V

Energy

8.99e-8 J

Field Intensity

High

Calculation Details:

Using Coulomb's law: E = kQ/r² where k = 1/(4πε₀εᵣ)

Real-Time Updates

All calculations update instantly as you modify input values. See immediate changes in field strength, force, and potential.

Multiple Calculations

Calculate electric field strength, force on a test charge, electric potential, and energy stored in the field.

Various Media

Account for different dielectric media including vacuum, water, glass, and paper with adjustable permittivity.

How to Use the Electric Field Calculator

Understanding Electric Fields

An electric field is a region around a charged particle or object within which a force would be exerted on other charged particles or objects. The strength of the electric field is measured in Newtons per Coulomb (N/C) and depends on the source charge and the distance from it.

Step-by-Step Guide

  1. Enter Charge Value: Input the magnitude of your source charge in Coulombs (C). For example, 1 nanoCoulomb = 1e-9 C.
  2. Select Charge Type: Choose whether the charge is positive or negative. This determines the direction of the electric field lines.
  3. Set Distance: Enter the distance from the source charge where you want to calculate the field strength, in meters (m).
  4. Choose Medium: Select the dielectric medium. Different materials affect electric field strength through their relative permittivity (εᵣ).
  5. Optional Test Charge: Add a test charge value to calculate the force exerted on it by the electric field.
  6. Calculate: Click the "Calculate Field" button or watch as results update in real-time as you change values.

Key Formulas Used

Applications in Real World

Electric field calculations are essential in designing capacitors, understanding atmospheric electricity, developing medical equipment like EEG and ECG machines, and in numerous industrial applications including electrostatic painting and precipitation.

Pro Tip

Use the "Add Multiple Charges" feature to calculate the net electric field from several point charges. The tool will compute the vector sum of all individual fields at your specified point.