Easily calculate the electric field strength created by a point charge and the electric force experienced by a test charge using our intuitive online calculator. Understand the fundamental principles of electromagnetism and solve complex physics problems quickly. Input charge values, distance, and test charge to get instant, accurate results for field intensity and attractive or repulsive forces.
Formula:
The electric field strength (E) created by a point charge (Q) at a distance (r) is given by Coulomb's Law:
E = k * |Q| / r²
Where:
- E is the electric field strength in Newtons per Coulomb (N/C).
- k is Coulomb's constant (approximately 8.9875 × 109 N·m²/C²).
- |Q| is the magnitude of the source charge in Coulombs (C).
- r is the distance from the source charge in meters (m).
The electric force (F) experienced by a test charge (q) placed in an electric field (E) is:
F = E * q
Where:
- F is the electric force in Newtons (N).
- q is the magnitude of the test charge in Coulombs (C).